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Acta Crystallographica Section E: Crystallographic Communications logoLink to Acta Crystallographica Section E: Crystallographic Communications
. 2026 Sep 30;82(Pt 10):1213–1216. doi: 10.1107/S2056989026009746

Crystal structure of a copper complex containing the 4-bromo-2-{[(2-hy­droxy­eth­yl)imino]­meth­yl}phenol base Schiff ligand

Adama Niang a, Elhadji Sékou Mane a, Paolo Pio Mazzeo b,c, Diéwo Ka a, Ousmane Diouf a, Mohamed Lamine Gaye a, Ibrahima Elhadji Thiam a, Alessia Bacchi b,c,*
Editor: J Ellenad
PMCID: PMC13638015  PMID: 42836217

The asymmetric unit contains two mononuclear units of the complex, each consisting of one deprotonated ligand, one thio­cyanate anion (SCN−) coordinated through its nitro­gen atom, one free water mol­ecule, and one free 5-bromo­salicyl­aldehyde mol­ecule, forming a co-crystal. The copper atom is four-coordinate, adopting a slightly distorted square-planar geometry defined by the tridentate ligand and the nitro­gen atom of the thio­cyanate anion. The water mol­ecule plays a key role in linking the two complex units through O–H⋯O hydrogen bonds. In the crystal, C—H⋯O and C—H⋯Br hydrogen bonds allow the free 5-bromo­salicyl­aldehyde mol­ecule to form a bridge between two adjacent layers.

Keywords: crystal structure, co-crystal, coordination polymer complex, copper(II)

Abstract

The coordination co-crystal (4-bromo-2-{[(2-hy­droxy­eth­yl)imino]­meth­yl}pheno­lolato-κ3O,N,O′)(thio­cyanato-κN)copper(II)–5-bromo-2-hy­droxy­benz­alde­hyde–water (2/1/1), [Cu(C9H9BrNO2)(NCS)]·0.5C7H5BrO2·0.5H2O or [Cu(HL)(SCN)]2·C7H5BrO2·H2O, crystallizes in the monoclinic space group P21/c. The asymmetric unit contains two mononuclear units of the complex, each consisting of one deprotonated ligand, one thio­cyanate anion (SCN−) coordinated through its nitro­gen atom, one free water mol­ecule, and one free 5-bromo­salicyl­aldehyde mol­ecule, forming a co-crystal. The copper atom is four-coordinate, adopting a slightly distorted square-planar geometry defined by the tridentate ligand and the nitro­gen atom of the thio­cyanate anion. Bond length values show that the thio­cyanate ion has a linear S—C≡N arrangement, typical of a terminal, N-bound iso­thio­cyanate group. The water mol­ecule plays a key role in linking the two complex units through O—H⋯O hydrogen bonds. In the crystal, C—H⋯O and C—H⋯Br hydrogen bonds allow the free 5-bromo­salicyl­aldehyde mol­ecule to form a bridge between two adjacent layers. Additional O—H⋯O, C—H⋯S, O—H⋯S, and C—H⋯N inter­actions further consolidate the overall structure.

1. Chemical context

The use of salicyl­aldehyde-derived ligands in the synthesis of coordination complexes has become increasingly important and represents a frequent research topic, particularly in copper-catalysed reactions (Juyal et al., 2023 ▸). Indeed, these ligands contain donor sites such as the phenolic oxygen atom and the imine nitro­gen atom, enabling the formation of stable complexes with various geometries, notably polynuclear copper(II) complexes.

Numerous applications have been reported, including in catalysis (Shelar et al., 2021 ▸), materials science (Abu-Dief & Mohamed, 2015 ▸), and medicine (More et al., 2019 ▸). The formation of a co-crystal associated with a polynuclear copper complex represents an important aspect of supra­molecular chemistry, as such systems are stabilized by networks of non-covalent inter­actions, including hydrogen bonds (Benito et al., 2025 ▸).

In the field of crystal engineering, co-crystals defined as single-phase crystalline materials comprising two or more neutral mol­ecular species have long been exploited to tune physicochemical attributes while preserving the mol­ecular identity of active components (Taylor & Day, 2018 ▸). We have synthesized a tridentate Schiff base ligand, (E)-4-bromo-2-{[(2-hy­droxy­eth­yl)imino]­meth­yl}phenol, derived from salicyl­aldehyde, which forms a polynuclear complex with copper(II) chloride and potassium thio­cyanate.1.

2. Structural commentary

The title compound (Fig. 1 ▸) crystallizes in the monoclinic system, space group P21/c. The asymmetric unit, [Cu(HL)(SCN)]2(C7H5BrO2)·H2O, contains two monodeprotonated ligand mol­ecules, two independent copper(II) ions, two monodentate thio­cyanate anions, one co-crystallized bromo-hy­droxy­benzaldehyde mol­ecule and one free water mol­ecule.

Figure 1.

Figure 1

The mol­ecular structure of the title compound showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level.

The Schiff base ligand acts in a tridentate fashion through the phenolate oxygen atom, the azomethine nitro­gen atom, and the alcoholic oxygen atom, resulting in one five-membered (CuOCCN) and one six-membered (CuOCCCN) chelate ring around each CuII ion.

Each copper atom is four-coordinate, bound by an N2O2 donor set comprising one azomethine (imine) nitro­gen and two oxygen atoms (one phenolate, one alcoholic) from the Schiff base ligand, together with one nitro­gen atom from its own thio­cyanate group, forming an essentially square-planar, moderately distorted coordination plane. The bond lengths within this square plane are Cu1—O1 = 1.911 (2) Å, Cu1—N1 = 1.928 (3) Å, Cu1—N3 = 1.952 (3) Å, and Cu1—O2 = 2.038 (2) Å. For the corresponding values for Cu2, see Table 1 ▸).

Table 1. Selected geometric parameters (Å, °).

Cu1—O1 1.911 (2) Cu2—O3 1.923 (2)
Cu1—O2 2.038 (2) Cu2—O4 2.005 (2)
Cu1—N1 1.928 (3) Cu2—N4 1.995 (3)
Cu1—N3 1.952 (3) Cu2—N2 1.927 (3)
       
O1—Cu1—O2 166.82 (10) O3—Cu2—O4 166.23 (10)
N3—Cu1—O2 89.45 (11) O3—Cu2—N4 91.49 (10)
O1—Cu1—N1 93.58 (10) O3—Cu2—N2 93.35 (11)
O1—Cu1—N3 94.69 (11) N4—Cu2—O4 92.01 (10)
N1—Cu1—O2 82.51 (10) N2—Cu2—O4 82.24 (11)
N1—Cu1—N3 171.73 (12) N2—Cu2—N4 173.38 (11)

A single, additional axial contact to the nitro­gen atom of the thio­cyanate group of the neighbouring mononuclear unit is present at each copper centre, but this contact is long and markedly asymmetric between the two independent centres [2.961 (3) Å for Cu1 versus 3.100 (3) Å for Cu2]. The latter value exceeds the sum of the van der Waals radii for Cu⋯N and cannot reasonably be described as a coordination bond. The geometry is therefore described as distorted square-planar (four-coordinate, N2O2), with a weak, asymmetric secondary axial contact of semi-coordinate character, rather than as distorted square-planar.

It is this weak, asymmetric N⋯Cu axial contact, not a Cu—S bond, that links each mononuclear [Cu(HL)(SCN)] unit to its neighbour and propagates the one-dimensional polymeric chain.

The deviations of the angles from the ideal value of 90° [O1—Cu1—N1 = 93.58 (10)°, O2—Cu1—N3 = 89.45 (11)°, N1—Cu1—O2 = 82.51 (10)°, and O1—Cu1—N3 = 94.69 (11)°] confirm the distortion of the coordination geometry.

The Cu1> ion is displaced from the least-squares plane defined by O1, N1, O2 and N3 (r.m.s. deviation 0.117 Å) by 0.006 (12) Å, indicating that the metal centre lies essentially within the equatorial plane. The dihedral angle of 175.63 (17)° between the phenolate ring plane (O1/C1–C6) and the plane of the open-chain fragment (C7/N1/C8/C9/O2) reveals a slight but measurable deviation from planarity, indicative of a twist in the ligand backbone.

The Cu1⋯Cu2 separation between two adjacent units is 3.7765 (5) Å, a distance too long to invoke any meaningful metal–metal inter­action. The cis angles span the range 82.51 (10)–94.69 (11)°, in good agreement with values reported for related complexes. The trans angles O1—Cu1—O2 = 166.82 (10)° and N3—Cu1—N1 = 171.73 (12)° deviate significantly from the ideal value of 180°, further confirming that Cu1 resides in a severely distorted square-planar coordination environment. The environment about Cu2 is similar, see Table 1 ▸).

The bond lengths within the two thio­cyanate groups are S1—C19 = 1.629 (3) Å, C19—N3 = 1.153 (4) Å, and S2—C20 = 1.643 (4) Å, C20—N4 = 1.106 (4) Å. These values are consistent with the linear S—C≡N arrangement typical of a terminal, N-bound iso­thio­cyanate group.

The sulfur atoms S1 and S2 are not bonded to any copper atom. The bridging mode is therefore not the classical μ-1,3 (S,N) mode frequently found in Cu–SCN polymers, but an asymmetric end-on μ-1,1 (N,N′) bridge, in which each thio­cyanate nitro­gen atom is strongly bonded to its own copper centre and forms a second, much weaker, semi-coordinate contact with the neighbouring copper centre, as summarized below.

3. Supra­molecular features

We note four strong inter­actions of the O—H—O type (Table 2 ▸). The water mol­ecule connects unit Cu2 via O4—H4⋯O7 to unit Cu1 via O7—H7A··O1. The O2—H2⋯O3 hydrogen bond similarly connects the two units. The O5—H5A⋯O6 inter­action corresponds to the classical intra­molecular hydrogen bond within the co-crystallized aldehyde fragment, confirming its nature as an isolated unit maintained in the network mainly by the weak C—H⋯·Br, C—H⋯S, C—H⋯N and C—H⋯O contacts and extending the three-dimensional network and further enhances the cohesion of the structure. The packing is shown in Fig. 2 ▸.

Table 2. Hydrogen-bond geometry (Å, °).

D—H⋯A D—H H⋯A D⋯A D—H⋯A
O4—H4⋯O7 0.82 1.75 2.562 (4) 174
O2—H2⋯O3 0.82 1.84 2.647 (3) 169
O7—H7A⋯O1 0.85 1.88 2.709 (4) 163
O7—H7B⋯S2i 0.85 2.64 3.290 (3) 135
O5—H5A⋯O6 0.82 1.94 2.655 (6) 146
C18—H18A⋯Br3ii 0.97 3.32 3.856 (4) 117
C18—H18A⋯S1 0.97 2.98 3.801 (4) 143
C18—H18A⋯N3 0.97 3.22 3.785 (5) 119
C17—H17A⋯O5 0.97 2.73 3.368 (5) 124
C16—H16⋯O6iii 0.93 2.52 3.376 (5) 153
C2—H2A⋯O2iv 0.93 2.92 3.726 (4) 146
C2—H2A⋯O7 0.93 3.08 3.548 (5) 113
C9—H9A⋯N4v 0.97 3.20 3.851 (4) 126
C9—H9B⋯O3v 0.97 3.03 3.613 (5) 120
C9—H9B⋯N4 0.97 3.20 3.700 (5) 114
C11—H11⋯S2v 0.93 3.11 3.709 (4) 124
C8—H8A⋯S1vi 0.97 3.29 3.881 (3) 121
C8—H8A⋯O3v 0.97 3.07 3.773 (5) 130
C8—H8B⋯S2iii 0.97 3.30 3.784 (4) 113
C8—H8B⋯O7vi 0.97 2.96 3.739 (6) 138
C14—H14⋯O6iii 0.93 3.12 3.827 (6) 134
C12—H12⋯S2v 0.93 2.93 3.616 (5) 131
C22—H22⋯O6iii 0.93 2.97 3.847 (6) 158
C27—H27⋯Br2vii 0.93 3.04 3.949 (6) 166

Symmetry codes: (i) Inline graphic; (ii) Inline graphic; (iii) Inline graphic; (iv) Inline graphic; (v) Inline graphic; (vi) Inline graphic; (vii) Inline graphic.

Figure 2.

Figure 2

Partial packing diagram for the title compound along [001].

4. Database survey

A search of the Cambridge Structural Database (CSD version 5.46, updates of November 2024 and February 2025; Groom et al., 2016) yielded 25 hits containing crystal structures of coordination complexes bearing the 4-bromo-2-{[(2-hy­droxy­eth­yl)imino]­meth­yl}phenol ligand. The first result corresponds to the structure of the free ligand reported by Thakur et al. 2024 ▸ (refcode YAWNOB01). 23 of the remaining hits correspond to coordination complexes of first-row transition metals. Only one second-row transition metal complex is noted, namely a cadmium complex (AWOHIE; Yu et al., 2011 ▸). Half of the hits correspond to mononuclear complexes in which two mol­ecules of the tridentate ligand chelate the metal ion including refcodes BAVGUD, BAVROI (Abbasi et al., 2017 ▸); HEDKUX (Liang et al., 2006 ▸); HEDKUX01 (Chumakov et al., 2007 ▸); HEDKUX02 (Zabierowski et al., 2013 ▸); MIWSEQ (De et al., 2001 ▸), among others. Polynuclear complexes are also reported, including a dinuclear copper complex (FOQKAY; Thakurta et al., 2009a ▸,b ▸), a tetra­nuclear copper complex (LICWAW; Yoshida et al.), and a tetra­nuclear iron complex (EBUWII; Oshio et al., 2004 ▸).

5. Synthesis and crystallization

The Schiff base ligand HL was prepared by adding 2.5 g (13.5 mmol) of 5-bromo­salicyl­aldehyde and 0.8 g (13.5 mmol) of 2-amino­ethanol, along with a few drops of glacial acetic acid, to 20 mL of ethanol in a flask. The mixture was refluxed, then evaporated to dryness using a rotary evaporator, giving a light-brown oil in 80% yield. This oil was dissolved in ethanol (100 mL) to give a 0.108 mol l−1 ligand solution.

For the complex synthesis, 0.17 g (1 mmol) of copper(II) chloride dihydrate and 0.19 g (2 mmol) of potassium thio­cyanate were dissolved in 10 mL of methanol and stirred under reflux for 30 minutes, giving a brown solution. Then, 9.2 mL of the ligand solution was added dropwise to the metal solution. After refluxing for 1 h, a green precipitate formed, which was filtered, washed with methanol, and dried, giving 0.14 g of product. Green single crystals suitable for X-ray diffraction were obtained after two weeks.

6. Refinement

Crystal data, data collection and structure refinement details are summarized in Table 3 ▸. H atoms were positioned geometrically and refined as riding with Uiso(H) = 1.2Ueq(C).

Table 3. Experimental details.

Crystal data
Chemical formula [Cu(C9H9BrNO2)(NCS)]·0.5C7H5BrO2·0.5H2O
M r 948.44
Crystal system, space group Monoclinic, P21/c
Temperature (K) 296
a, b, c (Å) 18.4400 (5), 13.7346 (3), 13.6402 (3)
β (°) 103.136 (1)
V (Å3) 3364.20 (14)
Z 4
Radiation type Mo Kα
μ (mm−1) 5.00
Crystal size (mm) 0.2 × 0.2 × 0.2
 
Data collection
Diffractometer Bruker D8 Venture Equipped with PhotonII Detector
Absorption correction Multi-scan (SADABS; Krause et al., 2015 ▸)
No. of measured, independent and observed [I > 2σ(I)] reflections 60122, 6909, 5316
R int 0.070
(sin θ/λ)max (Å−1) 0.626
 
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.034, 0.081, 1.01
No. of reflections 6909
No. of parameters 412
H-atom treatment H-atom parameters constrained
Δρmax, Δρmin (e Å−3) 0.62, −0.61

Computer programs: APEX and SAINT (Bruker, 2014 ▸), OLEX2.solve (Bourhis et al., 2015), SHELXL2018/3 (Sheldrick, 2015 ▸) and OLEX2 (Dolomanov et al., 2009 ▸).

Supplementary Material

Crystal structure: contains datablock(s) I. DOI: 10.1107/S2056989026009746/ex2102sup1.cif

e-82-01213-sup1.cif (1.7MB, cif)

Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989026009746/ex2102Isup2.hkl

e-82-01213-Isup2.hkl (549KB, hkl)

CCDC reference: 2588876

Additional supporting information: crystallographic information; 3D view; checkCIF report

Acknowledgments

IET gratefully acknowledges the support of Dr Eugenio Cavallo, Scientific Attaché, and the Italian Embassy in Dakar for their assistance in facilitating participation in the MAECI programme "Contributi per missioni di studio e ricerca 2025/ Contributions for study and research missions 2025", as well as for their continued commitment to fostering scientific collaboration between Senegal and Italy. The authors are grateful to the FAIRE programme provided by the Cambridge Crystallographic Data Centre (CCDC) for the opportunity to use the Cambridge Structural Database (CSD) and associated software.

supplementary crystallographic information

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Crystal data

[Cu(C9H9BrNO2)(NCS)]·0.5C7H5BrO2·0.5H2O F(000) = 1864
Mr = 948.44 Dx = 1.873 Mg m−3
Monoclinic, P21/c Mo Kα radiation, λ = 0.71073 Å
a = 18.4400 (5) Å Cell parameters from 60122 reflections
b = 13.7346 (3) Å θ = 1.9–26.4°
c = 13.6402 (3) Å µ = 5.00 mm−1
β = 103.136 (1)° T = 296 K
V = 3364.20 (14) Å3 Prism, green
Z = 4 0.2 × 0.2 × 0.2 mm

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Data collection

Bruker D8 Venture Equipped with PhotonII Detector diffractometer 5316 reflections with I > 2σ(I)
profile data from ω–scans Rint = 0.070
Absorption correction: multi-scan (SADABS; Krause et al., 2015) θmax = 26.4°, θmin = 1.9°
h = −23→23
60122 measured reflections k = −17→17
6909 independent reflections l = −17→15

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Refinement

Refinement on F2 0 restraints
Least-squares matrix: full Hydrogen site location: mixed
R[F2 > 2σ(F2)] = 0.034 H-atom parameters constrained
wR(F2) = 0.081 w = 1/[σ2(Fo2) + (0.0255P)2 + 4.7568P] where P = (Fo2 + 2Fc2)/3
S = 1.01 (Δ/σ)max = 0.001
6909 reflections Δρmax = 0.62 e Å−3
412 parameters Δρmin = −0.61 e Å−3

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Special details

Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)

x y z Uiso*/Ueq
Cu2 0.35837 (2) 0.72579 (3) 0.41858 (3) 0.03257 (10)
Cu1 0.52874 (2) 0.71541 (3) 0.30893 (3) 0.03342 (10)
Br3 −0.17062 (2) 0.47243 (3) 0.42161 (4) 0.06458 (14)
Br1 0.88193 (3) 0.96575 (4) 0.53387 (5) 0.07697 (16)
Br2 0.11977 (3) 0.30742 (4) 0.22273 (4) 0.08438 (19)
S1 0.29927 (5) 0.78586 (7) 0.09224 (7) 0.0424 (2)
S2 0.58322 (6) 0.80940 (7) 0.62694 (8) 0.0485 (2)
O3 0.36588 (12) 0.59043 (15) 0.38633 (18) 0.0365 (5)
O4 0.35052 (13) 0.87140 (16) 0.41724 (18) 0.0386 (5)
H4 0.388208 0.901725 0.414008 0.058*
O1 0.56911 (13) 0.84305 (15) 0.33838 (18) 0.0376 (5)
O2 0.48631 (13) 0.57876 (16) 0.31199 (19) 0.0399 (6)
H2 0.446357 0.578002 0.328833 0.060*
N4 0.46559 (16) 0.73030 (19) 0.4895 (2) 0.0353 (6)
N1 0.61991 (15) 0.65156 (18) 0.3749 (2) 0.0340 (6)
N2 0.25666 (15) 0.7357 (2) 0.3433 (2) 0.0338 (6)
N3 0.43073 (16) 0.7612 (2) 0.2376 (2) 0.0397 (7)
O7 0.46760 (17) 0.96055 (19) 0.3943 (3) 0.0702 (10)
H7A 0.502551 0.934333 0.372361 0.105*
H7B 0.481742 1.019032 0.407084 0.105*
O5 0.0839 (2) 0.7473 (3) 0.4295 (3) 0.0837 (11)
H5A 0.093367 0.779032 0.481825 0.126*
C19 0.37653 (18) 0.7704 (2) 0.1765 (2) 0.0305 (7)
C1 0.63814 (19) 0.8652 (2) 0.3819 (2) 0.0336 (7)
C6 0.69389 (18) 0.7959 (2) 0.4217 (2) 0.0339 (7)
C7 0.68112 (18) 0.6930 (2) 0.4166 (3) 0.0354 (7)
H7 0.720737 0.653006 0.446251 0.042*
C10 0.30904 (19) 0.5317 (2) 0.3505 (2) 0.0345 (7)
C18 0.2894 (2) 0.9050 (2) 0.3404 (3) 0.0412 (8)
H18A 0.302755 0.905842 0.275613 0.049*
H18B 0.275062 0.970303 0.355478 0.049*
C17 0.2264 (2) 0.8346 (2) 0.3389 (3) 0.0424 (8)
H17A 0.204564 0.846199 0.396192 0.051*
H17B 0.188028 0.843103 0.277853 0.051*
O6 0.0669 (2) 0.8034 (3) 0.6092 (3) 0.0965 (12)
C15 0.23619 (19) 0.5640 (3) 0.3092 (3) 0.0376 (8)
C16 0.21500 (19) 0.6653 (3) 0.3038 (3) 0.0385 (8)
H16 0.166982 0.680496 0.268639 0.046*
C2 0.6592 (2) 0.9643 (2) 0.3897 (3) 0.0399 (8)
H2A 0.623644 1.011294 0.363949 0.048*
C20 0.5114 (2) 0.7642 (2) 0.5457 (3) 0.0385 (8)
C5 0.7662 (2) 0.8277 (3) 0.4681 (3) 0.0426 (8)
H5 0.802604 0.782312 0.495451 0.051*
C9 0.5384 (2) 0.5164 (3) 0.3777 (3) 0.0470 (9)
H9A 0.528637 0.448840 0.358511 0.056*
H9B 0.533871 0.524355 0.446689 0.056*
C11 0.3229 (2) 0.4310 (3) 0.3530 (3) 0.0450 (9)
H11 0.370795 0.408127 0.379841 0.054*
C8 0.6145 (2) 0.5446 (2) 0.3682 (3) 0.0452 (9)
H8A 0.651666 0.515002 0.421687 0.054*
H8B 0.622919 0.522553 0.304106 0.054*
C3 0.7297 (2) 0.9935 (3) 0.4337 (3) 0.0446 (9)
H3 0.741978 1.059317 0.437188 0.054*
C4 0.7831 (2) 0.9240 (3) 0.4734 (3) 0.0461 (9)
C14 0.1799 (2) 0.4965 (3) 0.2705 (3) 0.0495 (10)
H14 0.131914 0.517809 0.241540 0.059*
C24 −0.0898 (2) 0.5597 (3) 0.4264 (3) 0.0462 (9)
C13 0.1959 (2) 0.3992 (3) 0.2754 (3) 0.0521 (10)
C12 0.2665 (2) 0.3655 (3) 0.3162 (3) 0.0518 (10)
H12 0.276256 0.299005 0.319076 0.062*
C25 −0.0669 (2) 0.6183 (3) 0.5070 (3) 0.0488 (9)
H25 −0.090676 0.615755 0.560213 0.059*
C26 −0.0078 (2) 0.6828 (3) 0.5107 (3) 0.0511 (10)
C21 0.0275 (2) 0.6859 (3) 0.4308 (4) 0.0555 (11)
C23 −0.0552 (2) 0.5622 (3) 0.3469 (3) 0.0559 (11)
H23 −0.071640 0.521800 0.291633 0.067*
C22 0.0035 (2) 0.6245 (3) 0.3492 (4) 0.0611 (12)
H22 0.027240 0.625415 0.295851 0.073*
C27 0.0160 (3) 0.7449 (4) 0.5975 (4) 0.0801 (15)
H27 −0.009566 0.739894 0.648683 0.096*

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Atomic displacement parameters (Å2)

U11 U22 U33 U12 U13 U23
Cu2 0.0329 (2) 0.0294 (2) 0.0334 (2) −0.00098 (16) 0.00347 (17) −0.00299 (17)
Cu1 0.0343 (2) 0.0288 (2) 0.0348 (2) 0.00313 (16) 0.00299 (17) 0.00019 (17)
Br3 0.0459 (2) 0.0590 (3) 0.0845 (3) −0.0085 (2) 0.0057 (2) −0.0066 (2)
Br1 0.0490 (3) 0.0770 (3) 0.0974 (4) −0.0180 (2) 0.0010 (2) −0.0192 (3)
Br2 0.0856 (4) 0.0834 (3) 0.0933 (4) −0.0563 (3) 0.0395 (3) −0.0404 (3)
S1 0.0369 (5) 0.0564 (6) 0.0320 (5) 0.0095 (4) 0.0035 (4) −0.0040 (4)
S2 0.0446 (5) 0.0535 (6) 0.0441 (5) −0.0064 (4) 0.0029 (4) −0.0037 (4)
O3 0.0330 (12) 0.0300 (11) 0.0454 (14) −0.0018 (9) 0.0066 (10) −0.0056 (10)
O4 0.0419 (14) 0.0305 (12) 0.0446 (14) −0.0008 (10) 0.0124 (11) −0.0016 (11)
O1 0.0366 (13) 0.0297 (11) 0.0434 (14) 0.0029 (10) 0.0026 (11) −0.0007 (10)
O2 0.0391 (14) 0.0338 (12) 0.0475 (15) −0.0012 (11) 0.0111 (11) −0.0019 (11)
N4 0.0459 (17) 0.0333 (15) 0.0233 (14) −0.0138 (13) 0.0007 (13) −0.0050 (12)
N1 0.0369 (16) 0.0277 (13) 0.0372 (16) 0.0042 (11) 0.0075 (12) 0.0027 (12)
N2 0.0313 (15) 0.0385 (15) 0.0319 (15) 0.0023 (12) 0.0078 (12) −0.0005 (12)
N3 0.0369 (16) 0.0424 (16) 0.0379 (17) 0.0038 (13) 0.0044 (14) 0.0008 (13)
O7 0.0595 (19) 0.0332 (14) 0.131 (3) 0.0022 (13) 0.048 (2) 0.0022 (17)
O5 0.063 (2) 0.084 (3) 0.112 (3) −0.0221 (18) 0.038 (2) 0.012 (2)
C19 0.0388 (19) 0.0279 (15) 0.0267 (16) 0.0020 (13) 0.0114 (15) −0.0019 (13)
C1 0.0390 (19) 0.0350 (17) 0.0289 (17) 0.0013 (14) 0.0123 (15) 0.0002 (14)
C6 0.0345 (18) 0.0370 (17) 0.0307 (17) 0.0011 (14) 0.0086 (14) −0.0002 (14)
C7 0.0327 (18) 0.0366 (17) 0.0365 (19) 0.0083 (14) 0.0069 (15) 0.0067 (15)
C10 0.0414 (19) 0.0331 (17) 0.0327 (18) −0.0085 (14) 0.0161 (15) −0.0065 (14)
C18 0.051 (2) 0.0343 (18) 0.041 (2) 0.0109 (16) 0.0169 (17) 0.0069 (16)
C17 0.037 (2) 0.0419 (19) 0.048 (2) 0.0089 (15) 0.0089 (16) 0.0030 (17)
O6 0.078 (3) 0.102 (3) 0.099 (3) −0.041 (2) −0.001 (2) −0.012 (2)
C15 0.0362 (19) 0.0426 (19) 0.0358 (19) −0.0062 (15) 0.0117 (15) −0.0088 (15)
C16 0.0281 (17) 0.050 (2) 0.0364 (19) −0.0015 (15) 0.0051 (14) −0.0060 (16)
C2 0.049 (2) 0.0314 (17) 0.041 (2) 0.0011 (15) 0.0136 (17) −0.0020 (15)
C20 0.044 (2) 0.0340 (17) 0.043 (2) 0.0084 (16) 0.0222 (18) 0.0087 (16)
C5 0.0369 (19) 0.047 (2) 0.044 (2) 0.0020 (16) 0.0080 (16) −0.0002 (17)
C9 0.048 (2) 0.0324 (18) 0.063 (3) 0.0054 (16) 0.0182 (19) 0.0097 (18)
C11 0.052 (2) 0.0371 (19) 0.046 (2) −0.0023 (16) 0.0118 (18) −0.0015 (16)
C8 0.046 (2) 0.0290 (17) 0.061 (3) 0.0065 (15) 0.0132 (18) 0.0037 (17)
C3 0.057 (2) 0.0362 (19) 0.042 (2) −0.0074 (17) 0.0153 (18) −0.0066 (16)
C4 0.040 (2) 0.053 (2) 0.044 (2) −0.0118 (17) 0.0093 (17) −0.0111 (18)
C14 0.037 (2) 0.060 (2) 0.053 (2) −0.0152 (18) 0.0127 (18) −0.018 (2)
C24 0.037 (2) 0.046 (2) 0.053 (2) 0.0041 (16) 0.0040 (18) 0.0042 (18)
C13 0.060 (3) 0.052 (2) 0.051 (2) −0.027 (2) 0.025 (2) −0.0200 (19)
C12 0.073 (3) 0.0360 (19) 0.052 (2) −0.0137 (19) 0.024 (2) −0.0082 (18)
C25 0.040 (2) 0.058 (2) 0.047 (2) −0.0010 (18) 0.0089 (17) 0.0069 (19)
C26 0.041 (2) 0.057 (2) 0.053 (2) −0.0026 (18) 0.0039 (18) 0.005 (2)
C21 0.041 (2) 0.056 (2) 0.070 (3) 0.0054 (19) 0.013 (2) 0.017 (2)
C23 0.060 (3) 0.052 (2) 0.054 (3) 0.012 (2) 0.009 (2) 0.001 (2)
C22 0.060 (3) 0.065 (3) 0.066 (3) 0.019 (2) 0.031 (2) 0.019 (2)
C27 0.069 (3) 0.093 (4) 0.074 (4) −0.030 (3) 0.008 (3) −0.006 (3)

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Geometric parameters (Å, º)

Cu1—O1 1.911 (2) C18—H18B 0.9700
Cu1—O2 2.038 (2) C18—C17 1.508 (5)
Cu1—N1 1.928 (3) C17—H17A 0.9700
Cu1—N3 1.952 (3) C17—H17B 0.9700
Cu2—O3 1.923 (2) O6—C27 1.217 (5)
Cu2—O4 2.005 (2) C15—C16 1.442 (5)
Cu2—N4 1.995 (3) C15—C14 1.403 (5)
Cu2—N2 1.927 (3) C16—H16 0.9300
Br3—C24 1.903 (4) C2—H2A 0.9300
Br1—C4 1.910 (4) C2—C3 1.363 (5)
Br2—C13 1.902 (4) C5—H5 0.9300
S1—C19 1.629 (3) C5—C4 1.358 (5)
S2—C20 1.643 (4) C9—H9A 0.9700
O3—C10 1.325 (4) C9—H9B 0.9700
O4—H4 0.8200 C9—C8 1.490 (5)
O4—C18 1.430 (4) C11—H11 0.9300
O1—C1 1.312 (4) C11—C12 1.380 (5)
O2—H2 0.8200 C8—H8A 0.9700
O2—C9 1.437 (4) C8—H8B 0.9700
N4—C20 1.106 (4) C3—H3 0.9300
N1—C7 1.277 (4) C3—C4 1.390 (5)
N1—C8 1.474 (4) C14—H14 0.9300
N2—C17 1.464 (4) C14—C13 1.367 (6)
N2—C16 1.276 (4) C24—C25 1.350 (5)
N3—C19 1.153 (4) C24—C23 1.378 (6)
O7—H7A 0.8502 C13—C12 1.375 (6)
O7—H7B 0.8501 C12—H12 0.9300
O5—H5A 0.8200 C25—H25 0.9300
O5—C21 1.343 (5) C25—C26 1.396 (5)
C1—C6 1.416 (5) C26—C21 1.391 (6)
C1—C2 1.412 (5) C26—C27 1.445 (7)
C6—C7 1.431 (5) C21—C22 1.387 (6)
C6—C5 1.409 (5) C23—H23 0.9300
C7—H7 0.9300 C23—C22 1.375 (6)
C10—C15 1.405 (5) C22—H22 0.9300
C10—C11 1.406 (5) C27—H27 0.9300
C18—H18A 0.9700
O1—Cu1—O2 166.82 (10) C15—C16—H16 117.3
N3—Cu1—O2 89.45 (11) C1—C2—H2A 118.8
O1—Cu1—N1 93.58 (10) C3—C2—C1 122.4 (3)
O1—Cu1—N3 94.69 (11) C3—C2—H2A 118.8
N1—Cu1—O2 82.51 (10) N4—C20—S2 176.2 (3)
N1—Cu1—N3 171.73 (12) C6—C5—H5 119.7
O3—Cu2—O4 166.23 (10) C4—C5—C6 120.6 (3)
O3—Cu2—N4 91.49 (10) C4—C5—H5 119.7
O3—Cu2—N2 93.35 (11) O2—C9—H9A 110.2
N4—Cu2—O4 92.01 (10) O2—C9—H9B 110.2
N2—Cu2—O4 82.24 (11) O2—C9—C8 107.5 (3)
N2—Cu2—N4 173.38 (11) H9A—C9—H9B 108.5
C10—O3—Cu2 125.5 (2) C8—C9—H9A 110.2
Cu2—O4—H4 116.5 C8—C9—H9B 110.2
C18—O4—Cu2 111.8 (2) C10—C11—H11 119.5
C18—O4—H4 109.5 C12—C11—C10 121.0 (4)
C1—O1—Cu1 126.8 (2) C12—C11—H11 119.5
Cu1—O2—H2 113.0 N1—C8—C9 107.8 (3)
C9—O2—Cu1 110.9 (2) N1—C8—H8A 110.1
C9—O2—H2 109.5 N1—C8—H8B 110.1
C20—N4—Cu2 150.0 (3) C9—C8—H8A 110.1
C7—N1—Cu1 126.4 (2) C9—C8—H8B 110.1
C7—N1—C8 120.9 (3) H8A—C8—H8B 108.5
C8—N1—Cu1 112.6 (2) C2—C3—H3 120.3
C17—N2—Cu2 113.8 (2) C2—C3—C4 119.3 (3)
C16—N2—Cu2 126.2 (2) C4—C3—H3 120.3
C16—N2—C17 119.9 (3) C5—C4—Br1 120.0 (3)
C19—N3—Cu1 161.4 (3) C5—C4—C3 121.0 (3)
H7A—O7—H7B 104.5 C3—C4—Br1 119.0 (3)
C21—O5—H5A 109.5 C15—C14—H14 120.2
N3—C19—S1 178.3 (3) C13—C14—C15 119.6 (4)
O1—C1—C6 124.2 (3) C13—C14—H14 120.2
O1—C1—C2 118.7 (3) C25—C24—Br3 120.1 (3)
C2—C1—C6 117.1 (3) C25—C24—C23 120.7 (4)
C1—C6—C7 123.2 (3) C23—C24—Br3 119.2 (3)
C5—C6—C1 119.6 (3) C14—C13—Br2 119.8 (3)
C5—C6—C7 117.2 (3) C14—C13—C12 121.5 (3)
N1—C7—C6 125.5 (3) C12—C13—Br2 118.7 (3)
N1—C7—H7 117.2 C11—C12—H12 120.2
C6—C7—H7 117.2 C13—C12—C11 119.6 (4)
O3—C10—C15 124.0 (3) C13—C12—H12 120.2
O3—C10—C11 117.7 (3) C24—C25—H25 119.9
C15—C10—C11 118.2 (3) C24—C25—C26 120.3 (4)
O4—C18—H18A 110.5 C26—C25—H25 119.9
O4—C18—H18B 110.5 C25—C26—C27 119.6 (4)
O4—C18—C17 106.2 (3) C21—C26—C25 119.4 (4)
H18A—C18—H18B 108.7 C21—C26—C27 120.9 (4)
C17—C18—H18A 110.5 O5—C21—C26 122.1 (4)
C17—C18—H18B 110.5 O5—C21—C22 118.5 (4)
N2—C17—C18 108.0 (3) C22—C21—C26 119.3 (4)
N2—C17—H17A 110.1 C24—C23—H23 120.0
N2—C17—H17B 110.1 C22—C23—C24 120.1 (4)
C18—C17—H17A 110.1 C22—C23—H23 120.0
C18—C17—H17B 110.1 C21—C22—H22 119.9
H17A—C17—H17B 108.4 C23—C22—C21 120.1 (4)
C10—C15—C16 123.3 (3) C23—C22—H22 119.9
C14—C15—C10 120.0 (3) O6—C27—C26 125.4 (5)
C14—C15—C16 116.7 (3) O6—C27—H27 117.3
N2—C16—C15 125.4 (3) C26—C27—H27 117.3
N2—C16—H16 117.3
Cu2—O3—C10—C15 15.2 (4) C10—C15—C14—C13 1.7 (6)
Cu2—O3—C10—C11 −165.6 (2) C10—C11—C12—C13 0.8 (6)
Cu2—O4—C18—C17 39.3 (3) C17—N2—C16—C15 −175.2 (3)
Cu2—N2—C17—C18 31.8 (3) C15—C10—C11—C12 −0.2 (5)
Cu2—N2—C16—C15 0.8 (5) C15—C14—C13—Br2 −179.9 (3)
Cu1—O1—C1—C6 −5.0 (5) C15—C14—C13—C12 −1.0 (6)
Cu1—O1—C1—C2 174.7 (2) C16—N2—C17—C18 −151.7 (3)
Cu1—O2—C9—C8 −35.9 (3) C16—C15—C14—C13 −178.5 (3)
Cu1—N1—C7—C6 −0.5 (5) C2—C1—C6—C7 −178.3 (3)
Cu1—N1—C8—C9 −37.5 (4) C2—C1—C6—C5 1.1 (5)
Br3—C24—C25—C26 −179.8 (3) C2—C3—C4—Br1 179.5 (3)
Br3—C24—C23—C22 −179.7 (3) C2—C3—C4—C5 0.5 (6)
Br2—C13—C12—C11 178.7 (3) C5—C6—C7—N1 −177.9 (3)
O3—C10—C15—C16 −1.6 (5) C11—C10—C15—C16 179.1 (3)
O3—C10—C15—C14 178.2 (3) C11—C10—C15—C14 −1.1 (5)
O3—C10—C11—C12 −179.5 (3) C8—N1—C7—C6 175.9 (3)
O4—C18—C17—N2 −45.1 (4) C14—C15—C16—N2 173.2 (3)
O1—C1—C6—C7 1.5 (5) C14—C13—C12—C11 −0.2 (6)
O1—C1—C6—C5 −179.2 (3) C24—C25—C26—C21 −0.1 (6)
O1—C1—C2—C3 −180.0 (3) C24—C25—C26—C27 −179.9 (4)
O2—C9—C8—N1 46.9 (4) C24—C23—C22—C21 −0.9 (6)
O5—C21—C22—C23 −178.5 (4) C25—C24—C23—C22 0.4 (6)
C1—C6—C7—N1 1.5 (5) C25—C26—C21—O5 179.1 (4)
C1—C6—C5—C4 −1.2 (5) C25—C26—C21—C22 −0.4 (6)
C1—C2—C3—C4 −0.6 (5) C25—C26—C27—O6 179.7 (5)
C6—C1—C2—C3 −0.2 (5) C26—C21—C22—C23 0.9 (6)
C6—C5—C4—Br1 −178.6 (3) C21—C26—C27—O6 −0.1 (8)
C6—C5—C4—C3 0.4 (6) C23—C24—C25—C26 0.2 (6)
C7—N1—C8—C9 145.7 (3) C27—C26—C21—O5 −1.1 (7)
C7—C6—C5—C4 178.2 (3) C27—C26—C21—C22 179.4 (4)
C10—C15—C16—N2 −7.0 (6)

(4-Bromo-2-{[(2-hydroxyethyl)imino]methyl}phenololato-κ3O,N,O')(thiocyanato-κN)copper(II)–5-bromo-2-hydroxybenzaldehyde–water (2/1/1) . Hydrogen-bond geometry (Å, º)

D—H···A D—H H···A D···A D—H···A
O4—H4···O7 0.82 1.75 2.562 (4) 174
O2—H2···O3 0.82 1.84 2.647 (3) 169
O7—H7A···O1 0.85 1.88 2.709 (4) 163
O7—H7B···S2i 0.85 2.64 3.290 (3) 135
O5—H5A···O6 0.82 1.94 2.655 (6) 146
C18—H18A···Br3ii 0.97 3.32 3.856 (4) 117
C18—H18A···S1 0.97 2.98 3.801 (4) 143
C18—H18A···N3 0.97 3.22 3.785 (5) 119
C17—H17A···O5 0.97 2.73 3.368 (5) 124
C16—H16···O6iii 0.93 2.52 3.376 (5) 153
C2—H2A···O2iv 0.93 2.92 3.726 (4) 146
C2—H2A···O7 0.93 3.08 3.548 (5) 113
C9—H9A···N4v 0.97 3.20 3.851 (4) 126
C9—H9B···O3v 0.97 3.03 3.613 (5) 120
C9—H9B···N4 0.97 3.20 3.700 (5) 114
C11—H11···S2v 0.93 3.11 3.709 (4) 124
C8—H8A···S1vi 0.97 3.29 3.881 (3) 121
C8—H8A···O3v 0.97 3.07 3.773 (5) 130
C8—H8B···S2iii 0.97 3.30 3.784 (4) 113
C8—H8B···O7vi 0.97 2.96 3.739 (6) 138
C14—H14···O6iii 0.93 3.12 3.827 (6) 134
C12—H12···S2v 0.93 2.93 3.616 (5) 131
C22—H22···O6iii 0.93 2.97 3.847 (6) 158
C27—H27···Br2vii 0.93 3.04 3.949 (6) 166

Symmetry codes: (i) −x+1, −y+2, −z+1; (ii) −x, y+1/2, −z+1/2; (iii) x, −y+3/2, z−1/2; (iv) −x+1, y+1/2, −z+1/2; (v) −x+1, −y+1, −z+1; (vi) −x+1, y−1/2, −z+1/2; (vii) −x, −y+1, −z+1.

References

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Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

Crystal structure: contains datablock(s) I. DOI: 10.1107/S2056989026009746/ex2102sup1.cif

e-82-01213-sup1.cif (1.7MB, cif)

Structure factors: contains datablock(s) I. DOI: 10.1107/S2056989026009746/ex2102Isup2.hkl

e-82-01213-Isup2.hkl (549KB, hkl)

CCDC reference: 2588876

Additional supporting information: crystallographic information; 3D view; checkCIF report


Articles from Acta Crystallographica Section E: Crystallographic Communications are provided here courtesy of International Union of Crystallography

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