Crystal structure of hexa­aqua­dichlorido­ytterbium(III) chloride

Abstract

The crystal structure of the title compound, [YbCl₂(H₂O)₆]Cl, was determined at 110 K. Samples were obtained from evaporated aceto­nitrile solutions containing the title compound, which consists of a [YbCl₂(H₂O)₆]⁺ cation and a Cl⁻ anion. The cations in the title compound sit on a twofold axis and form O—H⋯Cl hydrogen bonds with the nearby Cl⁻ anion. The coordination geometry around the metal centre forms a distorted square anti­prism. The ytterbium complex is isotypic with the europium complex [Tambrornino et al. (2014 ▸). Acta Cryst. E70, i27].

Related literature  

The ytterbium complex is isotypic with the europium complex, the redetermined structure of which was published recently (Tambrornino et al. 2014 ▸) which was in turn similar to studies of other lanthanoid chloride hydrates (Marezio et al., 1961 ▸).

Experimental  

Crystal data  

• [YbCl₂(H₂O)₆]Cl

• M _r = 387.49

• Monoclinic,

• a = 7.8158 (11) Å

• b = 6.4651 (3) Å

• c = 12.7250 (18) Å

• β = 131.45 (2)°

• V = 481.92 (16) ų

• Z = 2

• Mo Kα radiation

• μ = 10.52 mm⁻¹

• T = 110 K

• 0.24 × 0.18 × 0.17 mm

Data collection  

• Oxford Diffraction Xcalibur Sapphire3 diffractometer

• Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2009 ▸) T _min = 0.187, T _max = 0.268

• 12358 measured reflections

• 1806 independent reflections

• 1762 reflections with I > 2σ(I)

• R _int = 0.042

Refinement  

• R[F ² > 2σ(F ²)] = 0.018

• wR(F ²) = 0.041

• S = 1.12

• 1806 reflections

• 51 parameters

• H-atom parameters constrained

• Δρ_max = 0.91 e Å⁻³

• Δρ_min = −0.96 e Å⁻³

Data collection: CrysAlis CCD (Oxford Diffraction, 2009 ▸); cell refinement: CrysAlis RED (Oxford Diffraction, 2009 ▸); data reduction: CrysAlis RED; program(s) used to solve structure: SHELXS2014 (Sheldrick, 2008 ▸); program(s) used to refine structure: SHELXL2014 (Sheldrick, 2015 ▸); molecular graphics: PLATON (Spek, 2009 ▸) and ORTEP-3 for Windows (Farrugia, 2012 ▸); software used to prepare material for publication: SHELXL2014.

Supplementary Material

CCDC reference: 1062504

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

Table 1. Hydrogen-bond geometry (, ).

DHA	DH	HA	D A	DHA
O1H1ACl2i	0.91	2.37	3.2499(19)	163
O1H1BCl1ii	0.91	2.50	3.171(2)	131
O2H2ACl1iii	0.87	2.36	3.1460(18)	150
O2H2BCl2iv	0.87	2.38	3.1806(18)	154
O3H3ACl2v	0.88	2.33	3.179(2)	163
O3H3BCl1vi	0.88	2.48	3.1758(19)	136

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

supplementary crystallographic information

S1. Comment

Samples gathered from the mother liquor were coated with mineral oil prior to mounting to reduce sample decay. The ytterbium complex is isomorphous with a recently published redetermination of a europium complex (Tambrornino, et al. 2014) which was in turn similar to studies of other lanthanoid chloride hydrates (Marezio, et al. 1961).

Crystals of ytterbium(III) chloride hexahydrate consist of a [YbCl₂(H₂O)₆]¹⁺ cation and a chlorine anion. The covalent nature of the lanthanoid +3 cations are not surprising given their high charge density. An ORTEP of the title compound is shown in Fig. 1.

S2. Experimental

In 40.0 ml of acetonitrile, 0.1945 grams (0.5019 mmol) of ytterbium(III) chloride hexahydrate was added to 0.1000 grams (0.5020 mmol) of di-2-pyridyl ketone oxime (dpko) with the hopes of synthesizing a Yb-dpko complex. The mixture was heated to dissolve the solids. Upon cooling and subsequent evaporation, small colorless crystals of the title compound were isolated. The metal chloride was purchased from Strem chemicals (99.9% purity) whereas the dpko was purchased from Sigma-Aldrich (99.9%). Both were used without additional purification.

S3. Refinement

H atoms were included and were allowed to refine to ideal O—H distances based upon geometric considerations. Thermal parameters for all H atoms were included in the refinement in riding motion approximation with U_iso = 1.5U_eq of the carrier atom.

Figures

Fig. 1.

A view of the title compound (Farrugia, 2012). Displacement ellipsoids are drawn at the 50% probability level. H atoms have been omitted for clarity.

Crystal data

[YbCl2(H2O)6]Cl	Dx = 2.671 Mg m−3
Mr = 387.49	Melting point: 350 K
Monoclinic, P2/c	Mo Kα radiation, λ = 0.71073 Å
a = 7.8158 (11) Å	Cell parameters from 7486 reflections
b = 6.4651 (3) Å	θ = 4.9–33.8°
c = 12.7250 (18) Å	µ = 10.52 mm−1
β = 131.45 (2)°	T = 110 K
V = 481.92 (16) Å3	Block, light pink
Z = 2	0.24 × 0.18 × 0.17 mm
F(000) = 362

Data collection

Oxford Diffraction Xcalibur Sapphire3 diffractometer	1806 independent reflections
Radiation source: fine-focus sealed tube	1762 reflections with I > 2σ(I)
Graphite monochromator	Rint = 0.042
Detector resolution: 16.1790 pixels mm-1	θmax = 33.7°, θmin = 4.3°
ω scans	h = −11→12
Absorption correction: multi-scan (CrysAlis PRO; Oxford Diffraction, 2009)	k = −9→9
Tmin = 0.187, Tmax = 0.268	l = −19→19
12358 measured reflections

Refinement

Refinement on F2	Hydrogen site location: difference Fourier map
Least-squares matrix: full	H-atom parameters constrained
R[F2 > 2σ(F2)] = 0.018	w = 1/[σ2(Fo2) + (0.0207P)2] where P = (Fo2 + 2Fc2)/3
wR(F2) = 0.041	(Δ/σ)max = 0.001
S = 1.12	Δρmax = 0.91 e Å−3
1806 reflections	Δρmin = −0.96 e Å−3
51 parameters	Extinction correction: SHELXL2014 (Sheldrick, 2015), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4
0 restraints	Extinction coefficient: 0.0602 (13)

Special details

Experimental. Sample was covered in mineral oil prior to mounting in cryo stream.Hydrogen atoms were included and were allowed to refine to ideal O—H distances based upon geometric considerations. Thermal parameters for all H atoms were included in the refinement in riding motion approximation with Uiso = 1.5Ueq of the carrier atom.CrysAlisPro, Oxford Diffraction Ltd., Version 1.171.33.52 (release 06-11-2009 CrysAlis171 .NET) Empirical absorption correction using spherical harmonics, implemented in SCALE3 ABSPACK scaling algorithm (Oxford Diffraction (2009).

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.

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

	x	y	z	Uiso*/Ueq
Yb1	0.5000	0.65776 (2)	0.7500	0.01599 (6)
Cl1	0.32165 (12)	0.34336 (8)	0.56141 (7)	0.02594 (12)
Cl2	0.0000	−0.12652 (14)	0.2500	0.02883 (16)
O1	0.1817 (3)	0.5542 (3)	0.71889 (19)	0.0266 (3)
H1A	0.1626	0.4279	0.7416	0.040*
H1B	0.0569	0.6336	0.6823	0.040*
O2	0.7626 (3)	0.9242 (3)	0.85341 (19)	0.0276 (3)
H2A	0.7791	1.0181	0.9087	0.041*
H2B	0.8611	0.9467	0.8434	0.041*
O3	0.5420 (3)	0.8002 (3)	0.93497 (19)	0.0273 (3)
H3A	0.6709	0.8455	1.0145	0.041*
H3B	0.4315	0.8170	0.9361	0.041*

Atomic displacement parameters (Ų)

	U11	U22	U33	U12	U13	U23
Yb1	0.01594 (8)	0.01718 (8)	0.01703 (8)	0.000	0.01184 (6)	0.000
Cl1	0.0283 (3)	0.0258 (3)	0.0251 (3)	−0.00427 (18)	0.0183 (2)	−0.00488 (18)
Cl2	0.0271 (4)	0.0336 (4)	0.0299 (4)	0.000	0.0206 (4)	0.000
O1	0.0229 (8)	0.0278 (8)	0.0343 (9)	−0.0001 (6)	0.0212 (8)	0.0043 (7)
O2	0.0293 (9)	0.0262 (8)	0.0359 (9)	−0.0096 (7)	0.0253 (8)	−0.0098 (7)
O3	0.0310 (9)	0.0331 (8)	0.0246 (8)	−0.0050 (7)	0.0213 (8)	−0.0061 (7)

Geometric parameters (Å, º)

Yb1—O2i	2.3101 (17)	Yb1—O1i	2.3433 (16)
Yb1—O2	2.3101 (17)	Yb1—O1	2.3434 (17)
Yb1—O3i	2.3392 (17)	Yb1—Cl1i	2.7211 (7)
Yb1—O3	2.3392 (17)	Yb1—Cl1	2.7212 (7)
O2i—Yb1—O2	83.56 (10)	O1i—Yb1—Cl1i	76.75 (5)
O2i—Yb1—O3i	69.72 (6)	O1—Yb1—Cl1i	78.60 (5)
O2—Yb1—O3i	76.09 (7)	O2i—Yb1—Cl1	108.14 (6)
O2i—Yb1—O3	76.09 (7)	O2—Yb1—Cl1	143.38 (5)
O2—Yb1—O3	69.72 (6)	O3i—Yb1—Cl1	75.99 (5)
O3i—Yb1—O3	133.64 (9)	O3—Yb1—Cl1	146.11 (5)
O2i—Yb1—O1i	138.85 (6)	O1i—Yb1—Cl1	78.60 (5)
O2—Yb1—O1i	70.92 (6)	O1—Yb1—Cl1	76.75 (5)
O3i—Yb1—O1i	73.06 (7)	Cl1i—Yb1—Cl1	83.34 (3)
O3—Yb1—O1i	121.09 (7)	Yb1—O1—H1A	125.5
O2i—Yb1—O1	70.92 (6)	Yb1—O1—H1B	125.7
O2—Yb1—O1	138.85 (6)	H1A—O1—H1B	108.8
O3i—Yb1—O1	121.09 (7)	Yb1—O2—H2A	125.4
O3—Yb1—O1	73.06 (7)	Yb1—O2—H2B	125.4
O1i—Yb1—O1	146.79 (9)	H2A—O2—H2B	109.2
O2i—Yb1—Cl1i	143.38 (5)	Yb1—O3—H3A	125.4
O2—Yb1—Cl1i	108.15 (6)	Yb1—O3—H3B	125.4
O3i—Yb1—Cl1i	146.11 (5)	H3A—O3—H3B	109.2
O3—Yb1—Cl1i	75.99 (5)

Symmetry code: (i) −x+1, y, −z+3/2.

Hydrogen-bond geometry (Å, º)

D—H···A	D—H	H···A	D···A	D—H···A
O1—H1A···Cl2ii	0.91	2.37	3.2499 (19)	163
O1—H1B···Cl1iii	0.91	2.50	3.171 (2)	131
O2—H2A···Cl1iv	0.87	2.36	3.1460 (18)	150
O2—H2B···Cl2v	0.87	2.38	3.1806 (18)	154
O3—H3A···Cl2vi	0.88	2.33	3.179 (2)	163
O3—H3B···Cl1vii	0.88	2.48	3.1758 (19)	136

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