{4-Bromo-2-[2-(isopropyl­amino)ethyl­imino­meth­yl]phenolato}thio­cyanato­copper(II)

Abstract

In the title mononuclear Schiff base copper(II) complex, [Cu(C₁₂H₁₆BrN₂O)(NCS)], the Cu^II ion is coordinated by two N atoms and one O atom from a Schiff base ligand, and by one N atom from a thio­cyanate anion, giving a square-planar geometry. There are long-range inter­actions between the Cu atom and S [3.151 (5) Å] and Br [3.929 (5) Å] atoms above and below the square plane.

Related literature

For related literature, see: Ma et al. (2005 ▶); Ma, Gu et al. (2006 ▶); Ma, Lv et al. (2006 ▶); Ma, Wu et al. (2006 ▶).

Experimental

Crystal data

• [Cu(C₁₂H₁₆BrN₂O)(NCS)]

• M _r = 405.80

• Monoclinic,

• a = 6.161 (2) Å

• b = 20.223 (3) Å

• c = 12.930 (3) Å

• β = 95.332 (5)°

• V = 1604.0 (7) ų

• Z = 4

• Mo Kα radiation

• μ = 3.98 mm⁻¹

• T = 298 (2) K

• 0.40 × 0.38 × 0.37 mm

Data collection

• Bruker SMART 1000 diffractometer

• Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T _min = 0.299, T _max = 0.321 (expected range = 0.214–0.229)

• 11914 measured reflections

• 3474 independent reflections

• 2126 reflections with I > 2σ(I)

• R _int = 0.076

Refinement

• R[F ² > 2σ(F ²)] = 0.055

• wR(F ²) = 0.153

• S = 1.01

• 3474 reflections

• 183 parameters

• H-atom parameters constrained

• Δρ_max = 0.81 e Å⁻³

• Δρ_min = −0.49 e Å⁻³

Data collection: SMART (Bruker, 2007 ▶); cell refinement: SAINT (Bruker, 2007 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: SHELXL97.

Supplementary Material

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

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

Cu1—O1	1.903 (4)
Cu1—N1	1.932 (4)
Cu1—N3	1.959 (5)
Cu1—N2	2.075 (5)

O1—Cu1—N1	92.32 (17)
O1—Cu1—N3	87.98 (19)
N1—Cu1—N3	177.5 (2)
O1—Cu1—N2	171.59 (18)
N1—Cu1—N2	84.45 (18)
N3—Cu1—N2	94.91 (19)

supplementary crystallographic information

Comment

Recently, we have reported some metal complexes derived from the Schiff base ligands (Ma, Lv et al., 2006; Ma, Gu et al., 2006; Ma, Wu et al., 2006; Ma et al., 2005). As part of a further investigation of the structures of such complexes, the title mononuclear copper(II) complex, is reported in this paper.

In the complex the Cu atom is coordinated by two nitrogen atoms and one oxygen atom from a Schiff base ligand, and by one nitrogen atom from a thiocyanate anion, giving a square planar geometry (Fig. 1). There exist long range interactions between the Cu and S (3.151 (5) Å; symmetry code: 1 + x, y, z) and Br (3.929 (5) Å; symmetry code: 1 - x, - y, 1 - z) atoms above and below the square plane. All the bond lengths and angles (Table 1) related to the Cu atom in the complex are within normal ranges. The four coordinating atoms around the Cu centre are approximately coplanar, giving a square-planar geometry with an average deviation of 0.047 (4) Å; the Cu atom lies 0.089 (2) Å above this plane. The C8—C9—N2—C10 torsion angle is 2.0 (3)°.

Experimental

N-Isopropylethane-1,2-diamine (0.5 mmol, 51.0 mg) and 5-bromosalicylaldehyde (0.5 mmol, 100.5 mg) were dissolved in methanol (30 ml). The mixture was stirred for 1 h to obtain a clear yellow solution. To the solution was added with stirring a methanol solution (20 ml) of copper(II) acetate (0.5 mmol, 99.6 mg) and a methanol solution (10 ml) of ammonium thiocyanate (0.5 mmol, 38.0 mg). After keeping the resulting solution in air for a few days, blue block-shaped crystals were formed.

Refinement

All H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms with C—H = 0.93-0.97 Å, N—H = 0.91 Å, and with Uĩso~(H) = 1.2U~eq~(C,N) and 1.5U~eq~(methyl C).

Figures

Fig. 1.

The molecular structure at the 30% probability level ellipsoids.

Crystal data

[Cu(C12H16BrN2O)(NCS)]	F000 = 812
Mr = 405.80	Dx = 1.680 Mg m−3
Monoclinic, P21/n	Mo Kα radiation λ = 0.71073 Å
Hall symbol: -P 2yn	Cell parameters from 1880 reflections
a = 6.161 (2) Å	θ = 2.5–24.3º
b = 20.223 (3) Å	µ = 3.98 mm−1
c = 12.930 (3) Å	T = 298 (2) K
β = 95.332 (5)º	Block, blue
V = 1604.0 (7) Å3	0.40 × 0.38 × 0.37 mm
Z = 4

Data collection

Bruker SMART 1000 diffractometer	3474 independent reflections
Radiation source: fine-focus sealed tube	2126 reflections with I > 2σ(I)
Monochromator: graphite	Rint = 0.076
T = 298(2) K	θmax = 27.0º
ω scans	θmin = 1.9º
Absorption correction: multi-scan(SADABS; Sheldrick, 1996)	h = −7→7
Tmin = 0.299, Tmax = 0.321	k = −25→25
11914 measured reflections	l = −16→16

Refinement

Refinement on F2	Secondary atom site location: difference Fourier map
Least-squares matrix: full	Hydrogen site location: inferred from neighbouring sites
R[F2 > 2σ(F2)] = 0.055	H-atom parameters constrained
wR(F2) = 0.153	w = 1/[σ2(Fo2) + (0.0682P)2] where P = (Fo2 + 2Fc2)/3
S = 1.01	(Δ/σ)max < 0.001
3474 reflections	Δρmax = 0.81 e Å−3
183 parameters	Δρmin = −0.49 e Å−3
Primary atom site location: structure-invariant direct methods	Extinction correction: none

Special details

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

Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Ų)

	x	y	z	Uiso*/Ueq
Cu1	0.26493 (10)	0.20760 (3)	0.47898 (5)	0.0450 (2)
N1	0.5364 (7)	0.1721 (2)	0.5425 (3)	0.0408 (10)
N2	0.3292 (7)	0.2854 (2)	0.5819 (4)	0.0534 (12)
H2A	0.2664	0.2729	0.6397	0.064*
N3	−0.0164 (8)	0.2425 (3)	0.4201 (4)	0.0616 (14)
O1	0.2003 (6)	0.1286 (2)	0.4022 (3)	0.0551 (10)
S1	−0.4273 (2)	0.25260 (9)	0.31058 (11)	0.0566 (4)
Br1	0.80195 (10)	−0.08910 (3)	0.28530 (5)	0.0677 (3)
C1	0.6219 (9)	−0.0194 (3)	0.3274 (4)	0.0475 (13)
C2	0.6939 (9)	0.0269 (3)	0.3994 (4)	0.0466 (13)
H2	0.8364	0.0245	0.4299	0.056*
C3	0.5578 (8)	0.0781 (2)	0.4285 (4)	0.0382 (12)
C4	0.3387 (8)	0.0829 (3)	0.3822 (4)	0.0418 (12)
C5	0.2699 (9)	0.0321 (3)	0.3099 (4)	0.0532 (15)
H5	0.1270	0.0326	0.2795	0.064*
C6	0.4065 (10)	−0.0175 (3)	0.2836 (5)	0.0552 (15)
H6	0.3554	−0.0499	0.2365	0.066*
C7	0.6414 (9)	0.1221 (3)	0.5099 (4)	0.0436 (12)
H7	0.7808	0.1140	0.5413	0.052*
C8	0.6326 (9)	0.2117 (3)	0.6316 (4)	0.0544 (15)
H8A	0.7902	0.2077	0.6376	0.065*
H8B	0.5801	0.1957	0.6955	0.065*
C9	0.5675 (9)	0.2829 (3)	0.6140 (4)	0.0536 (15)
H9A	0.6006	0.3081	0.6773	0.064*
H9B	0.6478	0.3019	0.5602	0.064*
C10	0.2371 (15)	0.3525 (4)	0.5575 (6)	0.092 (2)
H10	0.0818	0.3447	0.5376	0.111*
C11	0.242 (2)	0.3952 (5)	0.6475 (9)	0.150 (4)
H11A	0.2122	0.3697	0.7072	0.225*
H11B	0.1328	0.4290	0.6354	0.225*
H11C	0.3828	0.4154	0.6596	0.225*
C12	0.319 (2)	0.3811 (5)	0.4651 (7)	0.152 (5)
H12A	0.2246	0.4165	0.4396	0.228*
H12B	0.3221	0.3477	0.4125	0.228*
H12C	0.4633	0.3979	0.4824	0.228*
C13	−0.1851 (9)	0.2472 (3)	0.3741 (4)	0.0457 (13)

Atomic displacement parameters (Ų)

	U11	U22	U33	U12	U13	U23
Cu1	0.0348 (4)	0.0592 (5)	0.0396 (4)	0.0019 (3)	−0.0042 (3)	−0.0043 (3)
N1	0.038 (2)	0.048 (3)	0.035 (2)	−0.006 (2)	−0.0057 (18)	0.002 (2)
N2	0.051 (3)	0.066 (3)	0.044 (3)	0.010 (2)	0.007 (2)	−0.005 (2)
N3	0.042 (3)	0.079 (4)	0.061 (3)	0.011 (3)	−0.008 (2)	−0.015 (3)
O1	0.036 (2)	0.066 (3)	0.061 (3)	0.0002 (19)	−0.0087 (17)	−0.011 (2)
S1	0.0407 (8)	0.0800 (11)	0.0466 (8)	−0.0024 (8)	−0.0086 (6)	0.0161 (8)
Br1	0.0639 (5)	0.0571 (4)	0.0838 (5)	−0.0015 (3)	0.0157 (4)	−0.0128 (3)
C1	0.043 (3)	0.045 (3)	0.055 (3)	−0.004 (3)	0.007 (3)	0.000 (3)
C2	0.043 (3)	0.046 (3)	0.050 (3)	−0.002 (3)	−0.001 (2)	0.007 (3)
C3	0.039 (3)	0.038 (3)	0.037 (3)	−0.004 (2)	0.000 (2)	0.005 (2)
C4	0.037 (3)	0.046 (3)	0.041 (3)	−0.006 (2)	−0.001 (2)	0.004 (2)
C5	0.040 (3)	0.062 (4)	0.054 (4)	−0.009 (3)	−0.011 (3)	−0.007 (3)
C6	0.058 (4)	0.052 (4)	0.054 (4)	−0.013 (3)	0.001 (3)	−0.007 (3)
C7	0.038 (3)	0.048 (3)	0.044 (3)	0.001 (3)	−0.003 (2)	0.015 (3)
C8	0.049 (3)	0.063 (4)	0.048 (3)	−0.006 (3)	−0.013 (3)	−0.009 (3)
C9	0.056 (4)	0.057 (4)	0.049 (3)	−0.002 (3)	0.006 (3)	−0.014 (3)
C10	0.121 (7)	0.082 (5)	0.073 (5)	0.032 (5)	0.002 (5)	−0.017 (4)
C11	0.248 (14)	0.083 (7)	0.124 (9)	0.029 (7)	0.039 (9)	−0.018 (6)
C12	0.280 (15)	0.099 (7)	0.084 (6)	0.089 (9)	0.055 (8)	0.028 (6)
C13	0.046 (3)	0.049 (3)	0.043 (3)	0.002 (3)	0.007 (3)	0.002 (3)

Geometric parameters (Å, °)

Cu1—O1	1.903 (4)	C4—C5	1.426 (7)
Cu1—N1	1.932 (4)	C5—C6	1.372 (8)
Cu1—N3	1.959 (5)	C5—H5	0.9300
Cu1—N2	2.075 (5)	C6—H6	0.9300
N1—C7	1.292 (6)	C7—H7	0.9300
N1—C8	1.481 (6)	C8—C9	1.507 (8)
N2—C9	1.489 (7)	C8—H8A	0.9700
N2—C10	1.493 (9)	C8—H8B	0.9700
N2—H2A	0.9100	C9—H9A	0.9700
N3—C13	1.152 (6)	C9—H9B	0.9700
O1—C4	1.300 (6)	C10—C11	1.448 (11)
S1—C13	1.639 (6)	C10—C12	1.458 (12)
Br1—C1	1.905 (5)	C10—H10	0.9800
C1—C2	1.364 (7)	C11—H11A	0.9600
C1—C6	1.394 (8)	C11—H11B	0.9600
C2—C3	1.406 (7)	C11—H11C	0.9600
C2—H2	0.9300	C12—H12A	0.9600
C3—C4	1.428 (7)	C12—H12B	0.9600
C3—C7	1.436 (7)	C12—H12C	0.9600
O1—Cu1—N1	92.32 (17)	N1—C7—C3	124.6 (5)
O1—Cu1—N3	87.98 (19)	N1—C7—H7	117.7
N1—Cu1—N3	177.5 (2)	C3—C7—H7	117.7
O1—Cu1—N2	171.59 (18)	N1—C8—C9	108.5 (5)
N1—Cu1—N2	84.45 (18)	N1—C8—H8A	110.0
N3—Cu1—N2	94.91 (19)	C9—C8—H8A	110.0
C7—N1—C8	120.1 (4)	N1—C8—H8B	110.0
C7—N1—Cu1	126.3 (3)	C9—C8—H8B	110.0
C8—N1—Cu1	113.5 (3)	H8A—C8—H8B	108.4
C9—N2—C10	115.9 (5)	N2—C9—C8	108.5 (5)
C9—N2—Cu1	106.1 (3)	N2—C9—H9A	110.0
C10—N2—Cu1	120.5 (4)	C8—C9—H9A	110.0
C9—N2—H2A	104.2	N2—C9—H9B	110.0
C10—N2—H2A	104.2	C8—C9—H9B	110.0
Cu1—N2—H2A	104.2	H9A—C9—H9B	108.4
C13—N3—Cu1	162.4 (5)	C11—C10—C12	116.1 (9)
C4—O1—Cu1	126.3 (3)	C11—C10—N2	113.2 (7)
C2—C1—C6	119.7 (5)	C12—C10—N2	112.3 (6)
C2—C1—Br1	122.8 (4)	C11—C10—H10	104.6
C6—C1—Br1	117.5 (4)	C12—C10—H10	104.6
C1—C2—C3	121.6 (5)	N2—C10—H10	104.6
C1—C2—H2	119.2	C10—C11—H11A	109.5
C3—C2—H2	119.2	C10—C11—H11B	109.5
C2—C3—C4	120.1 (5)	H11A—C11—H11B	109.5
C2—C3—C7	118.1 (5)	C10—C11—H11C	109.5
C4—C3—C7	121.8 (5)	H11A—C11—H11C	109.5
O1—C4—C5	118.8 (5)	H11B—C11—H11C	109.5
O1—C4—C3	125.2 (5)	C10—C12—H12A	109.5
C5—C4—C3	116.0 (5)	C10—C12—H12B	109.5
C6—C5—C4	122.4 (5)	H12A—C12—H12B	109.5
C6—C5—H5	118.8	C10—C12—H12C	109.5
C4—C5—H5	118.8	H12A—C12—H12C	109.5
C5—C6—C1	120.2 (5)	H12B—C12—H12C	109.5
C5—C6—H6	119.9	N3—C13—S1	178.7 (6)
C1—C6—H6	119.9