metal-organic compounds
Aquachlorido(2,2′:6′,2′′-terpyridyl)copper(II) chloride monohydrate
aInstitute of Physics, University of Neuchâtel, rue Emile-Argand 11, CH-2009 Neuchâtel, Switzerland
*Correspondence e-mail: helen.stoeckli-evans@unine.ch
The title complex, [CuCl(C15H11N3)(H2O)]Cl·H2O, is composed of a monocation that possesses mirror symmetry. The CuII atom has a distorted square-pyramidal geometry, being coordinated by the three N atoms of the terpyridine ligand and a Cl atom in the equatorial plane, and by a water molecule O atom in the axial position. The charges are balanced by a chloride anion positionally disorded over two positions related by the mirror symmetry. The compound crystallizes as a monohydrate, with the water molecule also being positionally disordered over two positions related by the mirror symmetry. In the crystal, the various components of the complex are linked via O—H⋯O and O—H⋯Cl hydrogen bonds, forming a two-dimensional network in the ab plane. There are also a number of C—H⋯Cl and C—H⋯O interactions which stabilize the crystal structure.
Related literature
For details of the Cambridge Structural Database, see: Allen (2002). For the structure of a related compound, see: Koo et al. (2003). For the τ descriptor for 5-coordination, see: Addison et al. (1984); Spek (2009).
Experimental
Crystal data
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Refinement
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Data collection: X-AREA (Stoe & Cie, 2006); cell X-AREA; data reduction: X-RED32 (Stoe & Cie, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97.
Supporting information
https://doi.org/10.1107/S160053681003391X/om2357sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S160053681003391X/om2357Isup2.hkl
An aqueous solution (20 ml) of copper(II)chloride dihydrate (0.429 mmol, 75 mg) and 2, 2':6' 2''-terpyridine (0.429 mmol, 100 mg) was heated at 353 K for 1 h. After hot filtration the green solution was cooled to RT and sodium sulfite (1.717 mmol, 216 mg) was added. The resulting solution was left in the fridge for two months and green block-like crystals were obtained together with a small quantity of greenish-blue crystals. The latter were shown by X-ray
to be the title compound (I).The chlorine anion (Cl2) and the water molecule of crystallization (O2W) were found to be split over two positions related by the mirror plane; they were refined with occupancies of 0.5 each. The water molecule H-atoms were located in a difference electron-density map and were refined with distance restraints of 0.84 (2) Å and Uiso(H) = 1.5Ueq(O). The C-bound H-atoms were included in calculated positions and treated as riding atoms: C—H = 0.95 Å with Uiso(H) = 1.2Ueq(C).
The title compound, (I), was prepared as a by-product of the reaction of 2,2':6',2''-terpyridine (= terpy) with CuCl2 in the presence of sodium sulphite. A search of the Cambridge Structural Database (CSD, Version 5.1, last update May 2010; Allen et al., 2002) for copper(II) terpyridine complexes with a water molecule coordinated to the copper(II) atom revealed 22 hits. With a chloride atom coordinated to the copper(II) atom 33 hits were obtained. Surprisingly, only one compound, involving bisterpy (= 2,2':4',4'':2'',2'''-quarterpyridyl, 6',6''-di-2-pyridine) was located with both a chloride and a water molecule coordinated to the copper(II) atom, namely [Cu2(bisterpy)(H2O)2Cl2]Cl2 (II) [Koo et al., 2003].
The structure of compound (I) is illustrated in Fig. 1. It is composed of a [(H2OClCu(terp)]+ cation that possesses mirror symmetry (with atoms Cu1, Cl1, N1, O1W and C3 lying in the mirror plane), and a Cl- anion. This anion, atom Cl2, is positionally disordered over two postions related by the mirror symmetry. A water molecule of crystallization, O2W, is also present and it too is positionally disordered over two postions related by the mirror symmetry. The bond distances and angles are similar to those in compound (II). For example, the Cu1—Cl1 and Cu1—O1W distances are 2.2255 (6) and 2.3372(19 Å, respectively, compared to 2.233 and 2.330 Å, respectively, in (II). The copper coordination sphere is distorted square pyramidal with a τ value of 0.17, compared to 0.18 in (II) [idealized values are 0 for square pyramidal and 1 for trigonal bipyramidal; Addison et al., 1984; Spek, 2009].
In the crystal of (I) the cations are linked to the anions and the water molecules of crystallization by O—H···O and O—H···Cl hydrogen bonds resulting in the formation of a two-dimensional network (Table 1 and Fig. 2). In the crystal C—H···O and C—H···Cl interactions are also present (Table 1).
For details of the Cambridge Structural Database, see: Allen (2002). For the structure of a related compound, see: Koo et al. (2003). For the τ descriptor for 5-coordination, see: Addison et al. (1984); Spek (2009).
Data collection: X-AREA (Stoe & Cie, 2006); cell
X-AREA (Stoe & Cie, 2006); data reduction: X-RED32 (Stoe & Cie, 2006); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: PLATON (Spek, 2009) and Mercury (Macrae et al., 2006); software used to prepare material for publication: SHELXL97 (Sheldrick, 2008).Fig. 1. A view of the molecular structure of compound (I) with the displacement ellipsoids drawn at the 50% probability level [Symmetry code: (a) = x, -y, z; the H-atoms of the disordered water molecule of crystallization (O2w), and the symmetry related Cl- anion (Cl2a) and water molecule (O2wa) are not shown]. | |
Fig. 2. A view along the c axis of the crystal packing of compound (I). The O—H···O and O—H···Cl hydrogen bonds are shown as dashed cyan lines (see Table 1 for details; H-atoms not involved in hydrogen bonding have been omitted for clarity). |
[CuCl(C15H11N3)(H2O)]Cl·H2O | F(000) = 820 |
Mr = 403.74 | Dx = 1.670 Mg m−3 |
Monoclinic, C2/m | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2y | Cell parameters from 17467 reflections |
a = 9.7155 (8) Å | θ = 1.7–29.6° |
b = 13.6929 (8) Å | µ = 1.70 mm−1 |
c = 12.6599 (10) Å | T = 173 K |
β = 107.532 (6)° | Plate, blue-green |
V = 1606.0 (2) Å3 | 0.40 × 0.40 × 0.10 mm |
Z = 4 |
Stoe IPDS-2 diffractometer | 2267 independent reflections |
Radiation source: fine-focus sealed tube | 2027 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.033 |
phi + ω scans | θmax = 29.2°, θmin = 1.7° |
Absorption correction: multi-scan (MULscanABS in PLATON; Spek, 2009) | h = −13→13 |
Tmin = 0.688, Tmax = 1.000 | k = −17→18 |
14960 measured reflections | l = −17→17 |
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)] = 0.030 | H atoms treated by a mixture of independent and constrained refinement |
wR(F2) = 0.079 | w = 1/[σ2(Fo2) + (0.0448P)2 + 1.3613P] where P = (Fo2 + 2Fc2)/3 |
S = 1.09 | (Δ/σ)max < 0.001 |
2267 reflections | Δρmax = 0.59 e Å−3 |
131 parameters | Δρmin = −0.70 e Å−3 |
4 restraints | Extinction correction: SHELXL97 (Sheldrick, 2008), Fc*=kFc[1+0.001xFc2λ3/sin(2θ)]-1/4 |
Primary atom site location: structure-invariant direct methods | Extinction coefficient: 0.0027 (7) |
[CuCl(C15H11N3)(H2O)]Cl·H2O | V = 1606.0 (2) Å3 |
Mr = 403.74 | Z = 4 |
Monoclinic, C2/m | Mo Kα radiation |
a = 9.7155 (8) Å | µ = 1.70 mm−1 |
b = 13.6929 (8) Å | T = 173 K |
c = 12.6599 (10) Å | 0.40 × 0.40 × 0.10 mm |
β = 107.532 (6)° |
Stoe IPDS-2 diffractometer | 2267 independent reflections |
Absorption correction: multi-scan (MULscanABS in PLATON; Spek, 2009) | 2027 reflections with I > 2σ(I) |
Tmin = 0.688, Tmax = 1.000 | Rint = 0.033 |
14960 measured reflections |
R[F2 > 2σ(F2)] = 0.030 | 4 restraints |
wR(F2) = 0.079 | H atoms treated by a mixture of independent and constrained refinement |
S = 1.09 | Δρmax = 0.59 e Å−3 |
2267 reflections | Δρmin = −0.70 e Å−3 |
131 parameters |
Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles |
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. |
x | y | z | Uiso*/Ueq | Occ. (<1) | |
Cu1 | 0.62103 (3) | 0.00000 | 0.15295 (2) | 0.0228 (1) | |
Cl1 | 0.71809 (7) | 0.00000 | 0.01460 (5) | 0.0313 (2) | |
O1W | 0.8290 (2) | 0.00000 | 0.30520 (15) | 0.0297 (5) | |
N1 | 0.5024 (2) | 0.00000 | 0.25225 (16) | 0.0220 (5) | |
N2 | 0.59110 (15) | 0.14574 (10) | 0.16522 (11) | 0.0232 (3) | |
C1 | 0.46408 (17) | −0.08528 (12) | 0.28568 (13) | 0.0236 (4) | |
C2 | 0.38165 (18) | −0.08804 (13) | 0.35839 (14) | 0.0285 (5) | |
C3 | 0.3403 (3) | 0.00000 | 0.3937 (2) | 0.0307 (7) | |
C4 | 0.51479 (17) | 0.16973 (12) | 0.23508 (13) | 0.0232 (4) | |
C5 | 0.48556 (19) | 0.26583 (13) | 0.25435 (15) | 0.0285 (5) | |
C6 | 0.5360 (2) | 0.33929 (13) | 0.20053 (16) | 0.0324 (5) | |
C7 | 0.6149 (2) | 0.31520 (13) | 0.12996 (16) | 0.0316 (5) | |
C8 | 0.64036 (19) | 0.21726 (13) | 0.11436 (14) | 0.0281 (5) | |
Cl2 | 0.1811 (2) | 0.17457 (12) | 0.53617 (15) | 0.0315 (4) | 0.500 |
O2W | 0.1572 (8) | 0.1517 (5) | 0.5452 (7) | 0.0527 (19) | 0.500 |
H1 | 0.826 (3) | −0.0471 (14) | 0.3423 (18) | 0.0450* | |
H2 | 0.35450 | −0.14850 | 0.38310 | 0.0340* | |
H3 | 0.28300 | 0.00000 | 0.44270 | 0.0370* | |
H5 | 0.43180 | 0.28120 | 0.30370 | 0.0340* | |
H6 | 0.51640 | 0.40580 | 0.21210 | 0.0390* | |
H7 | 0.65110 | 0.36470 | 0.09280 | 0.0380* | |
H8 | 0.69460 | 0.20050 | 0.06590 | 0.0340* | |
H2A | 0.070 (2) | 0.168 (4) | 0.520 (6) | 0.0790* | 0.500 |
H2B | 0.215 (5) | 0.193 (4) | 0.534 (7) | 0.0790* | 0.500 |
U11 | U22 | U33 | U12 | U13 | U23 | |
Cu1 | 0.0288 (2) | 0.0179 (2) | 0.0255 (2) | 0.0000 | 0.0142 (1) | 0.0000 |
Cl1 | 0.0424 (3) | 0.0279 (3) | 0.0310 (3) | 0.0000 | 0.0223 (2) | 0.0000 |
O1W | 0.0352 (9) | 0.0237 (8) | 0.0312 (9) | 0.0000 | 0.0114 (7) | 0.0000 |
N1 | 0.0247 (9) | 0.0203 (9) | 0.0230 (8) | 0.0000 | 0.0104 (7) | 0.0000 |
N2 | 0.0261 (6) | 0.0193 (6) | 0.0255 (6) | −0.0001 (5) | 0.0096 (5) | 0.0007 (5) |
C1 | 0.0253 (7) | 0.0211 (8) | 0.0252 (7) | −0.0019 (6) | 0.0088 (6) | 0.0004 (6) |
C2 | 0.0327 (8) | 0.0262 (8) | 0.0302 (8) | −0.0034 (6) | 0.0148 (7) | 0.0022 (6) |
C3 | 0.0351 (12) | 0.0320 (13) | 0.0311 (11) | 0.0000 | 0.0191 (10) | 0.0000 |
C4 | 0.0242 (7) | 0.0201 (7) | 0.0252 (7) | 0.0008 (6) | 0.0071 (6) | −0.0001 (6) |
C5 | 0.0302 (8) | 0.0226 (8) | 0.0331 (8) | 0.0015 (6) | 0.0101 (7) | −0.0025 (6) |
C6 | 0.0367 (9) | 0.0195 (8) | 0.0398 (9) | 0.0003 (7) | 0.0097 (7) | −0.0007 (7) |
C7 | 0.0358 (9) | 0.0226 (8) | 0.0361 (9) | −0.0040 (7) | 0.0103 (7) | 0.0043 (7) |
C8 | 0.0292 (8) | 0.0251 (8) | 0.0309 (8) | −0.0022 (7) | 0.0106 (6) | 0.0023 (6) |
Cl2 | 0.0346 (7) | 0.0289 (7) | 0.0337 (5) | 0.0011 (5) | 0.0146 (5) | −0.0028 (5) |
O2W | 0.042 (3) | 0.053 (4) | 0.065 (3) | −0.001 (2) | 0.019 (2) | 0.015 (3) |
Cu1—Cl1 | 2.2253 (7) | N2—C8 | 1.337 (2) |
Cu1—Cl1i | 3.3383 (8) | N2—C4 | 1.355 (2) |
Cu1—O1W | 2.3348 (19) | C1—C4ii | 1.477 (2) |
Cu1—N1 | 1.945 (2) | C1—C2 | 1.391 (2) |
Cu1—N2 | 2.0294 (14) | C2—C3 | 1.387 (2) |
Cu1—N2ii | 2.0294 (14) | C4—C5 | 1.383 (2) |
Cl2—O2W | 0.426 (8) | C5—C6 | 1.385 (3) |
Cl2—H2B | 0.42 (6) | C6—C7 | 1.381 (3) |
Cl2—H2A | 1.04 (3) | C7—C8 | 1.389 (3) |
O1W—H1ii | 0.80 (2) | C2—H2 | 0.9500 |
O1W—H1 | 0.80 (2) | C3—H3 | 0.9500 |
O2W—H2B | 0.84 (6) | C5—H5 | 0.9500 |
O2W—H2A | 0.84 (4) | C6—H6 | 0.9500 |
N1—C1 | 1.3328 (19) | C7—H7 | 0.9500 |
N1—C1ii | 1.3328 (19) | C8—H8 | 0.9500 |
Cl1—Cu1—O1W | 100.56 (5) | C2—C1—C4ii | 126.85 (15) |
Cl1—Cu1—N1 | 169.42 (6) | N1—C1—C2 | 120.37 (16) |
Cl1—Cu1—N2 | 99.48 (4) | C1—C2—C3 | 118.05 (17) |
Cl1—Cu1—N2ii | 99.48 (4) | C2—C3—C2ii | 120.8 (2) |
O1W—Cu1—N1 | 90.02 (8) | N2—C4—C1ii | 114.40 (14) |
O1W—Cu1—N2 | 92.59 (4) | N2—C4—C5 | 121.85 (15) |
O1W—Cu1—N2ii | 92.59 (4) | C1ii—C4—C5 | 123.74 (16) |
N1—Cu1—N2 | 79.87 (4) | C4—C5—C6 | 118.84 (17) |
N1—Cu1—N2ii | 79.87 (4) | C5—C6—C7 | 119.51 (17) |
N2—Cu1—N2ii | 159.07 (6) | C6—C7—C8 | 118.69 (17) |
O2W—Cl2—H2B | 163 (10) | N2—C8—C7 | 122.27 (17) |
H2A—Cl2—H2B | 145 (8) | C3—C2—H2 | 121.00 |
Cu1—O1W—H1ii | 107.9 (19) | C1—C2—H2 | 121.00 |
H1—O1W—H1ii | 107 (2) | C2—C3—H3 | 120.00 |
Cu1—O1W—H1 | 107.9 (19) | C2ii—C3—H3 | 120.00 |
H2A—O2W—H2B | 114 (6) | C4—C5—H5 | 121.00 |
Cu1—N1—C1ii | 118.81 (10) | C6—C5—H5 | 121.00 |
Cu1—N1—C1 | 118.81 (10) | C7—C6—H6 | 120.00 |
C1—N1—C1ii | 122.37 (18) | C5—C6—H6 | 120.00 |
C4—N2—C8 | 118.84 (15) | C6—C7—H7 | 121.00 |
Cu1—N2—C8 | 127.08 (12) | C8—C7—H7 | 121.00 |
Cu1—N2—C4 | 114.06 (11) | C7—C8—H8 | 119.00 |
N1—C1—C4ii | 112.75 (15) | N2—C8—H8 | 119.00 |
O1W—Cu1—N1—C1 | −89.53 (15) | Cu1—N2—C4—C5 | 179.30 (13) |
N2—Cu1—N1—C1 | 177.85 (17) | Cu1—N2—C4—C1ii | −1.98 (18) |
N2—Cu1—N1—C1ii | −3.10 (15) | C8—N2—C4—C5 | 0.6 (2) |
N2ii—Cu1—N1—C1 | 3.10 (15) | C8—N2—C4—C1ii | 179.29 (15) |
Cl1—Cu1—N2—C4 | 171.96 (11) | Cu1—N2—C8—C7 | −179.12 (14) |
Cl1—Cu1—N2—C8 | −9.43 (15) | C4—N2—C8—C7 | −0.6 (3) |
O1W—Cu1—N2—C4 | −86.88 (12) | N1—C1—C2—C3 | 0.5 (3) |
O1W—Cu1—N2—C8 | 91.73 (15) | C4ii—C1—C2—C3 | −177.64 (19) |
N1—Cu1—N2—C4 | 2.68 (12) | C2—C1—C4ii—N2ii | 178.71 (16) |
N1—Cu1—N2—C8 | −178.71 (16) | C2—C1—C4ii—C5ii | 0.0 (3) |
N2ii—Cu1—N2—C4 | 17.3 (2) | C1—C2—C3—C2ii | −0.8 (3) |
N2ii—Cu1—N2—C8 | −164.12 (15) | N2—C4—C5—C6 | 0.0 (3) |
Cu1—N1—C1—C2 | 178.75 (13) | C1ii—C4—C5—C6 | −178.62 (17) |
Cu1—N1—C1—C4ii | −2.9 (2) | C4—C5—C6—C7 | −0.5 (3) |
C1ii—N1—C1—C2 | −0.3 (3) | C5—C6—C7—C8 | 0.5 (3) |
Cu1—N1—C1ii—C4 | 2.9 (2) | C6—C7—C8—N2 | 0.0 (3) |
C1—N1—C1ii—C4 | −178.13 (17) |
Symmetry codes: (i) −x+1, y, −z; (ii) x, −y, z. |
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1···Cl2iii | 0.80 (2) | 2.34 (2) | 3.143 (2) | 175 (2) |
O1W—H1···O2Wiii | 0.80 (2) | 1.99 (2) | 2.787 (8) | 170 (2) |
O2W—H2A···O2Wiv | 0.84 (2) | 2.13 (3) | 2.922 (15) | 159 (6) |
C2—H2···Cl2v | 0.95 | 2.69 | 3.635 (2) | 172 |
C5—H5···Cl2vi | 0.95 | 2.65 | 3.593 (3) | 172 |
C5—H5···O2Wvi | 0.95 | 2.50 | 3.429 (8) | 166 |
C7—H7···Cl1vii | 0.95 | 2.82 | 3.765 (2) | 175 |
Symmetry codes: (iii) −x+1, −y, −z+1; (iv) −x, y, −z+1; (v) −x+1/2, y−1/2, −z+1; (vi) −x+1/2, −y+1/2, −z+1; (vii) −x+3/2, y+1/2, −z. |
Experimental details
Crystal data | |
Chemical formula | [CuCl(C15H11N3)(H2O)]Cl·H2O |
Mr | 403.74 |
Crystal system, space group | Monoclinic, C2/m |
Temperature (K) | 173 |
a, b, c (Å) | 9.7155 (8), 13.6929 (8), 12.6599 (10) |
β (°) | 107.532 (6) |
V (Å3) | 1606.0 (2) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 1.70 |
Crystal size (mm) | 0.40 × 0.40 × 0.10 |
Data collection | |
Diffractometer | Stoe IPDS2 |
Absorption correction | Multi-scan (MULscanABS in PLATON; Spek, 2009) |
Tmin, Tmax | 0.688, 1.000 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 14960, 2267, 2027 |
Rint | 0.033 |
(sin θ/λ)max (Å−1) | 0.687 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.030, 0.079, 1.09 |
No. of reflections | 2267 |
No. of parameters | 131 |
No. of restraints | 4 |
H-atom treatment | H atoms treated by a mixture of independent and constrained refinement |
Δρmax, Δρmin (e Å−3) | 0.59, −0.70 |
Computer programs: X-AREA (Stoe & Cie, 2006), X-RED32 (Stoe & Cie, 2006), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), PLATON (Spek, 2009) and Mercury (Macrae et al., 2006).
D—H···A | D—H | H···A | D···A | D—H···A |
O1W—H1···Cl2i | 0.80 (2) | 2.34 (2) | 3.143 (2) | 175 (2) |
O1W—H1···O2Wi | 0.80 (2) | 1.99 (2) | 2.787 (8) | 170 (2) |
O2W—H2A···O2Wii | 0.84 (2) | 2.13 (3) | 2.922 (15) | 159 (6) |
C2—H2···Cl2iii | 0.95 | 2.69 | 3.635 (2) | 172 |
C5—H5···Cl2iv | 0.95 | 2.65 | 3.593 (3) | 172 |
C5—H5···O2Wiv | 0.95 | 2.50 | 3.429 (8) | 166 |
C7—H7···Cl1v | 0.95 | 2.82 | 3.765 (2) | 175 |
Symmetry codes: (i) −x+1, −y, −z+1; (ii) −x, y, −z+1; (iii) −x+1/2, y−1/2, −z+1; (iv) −x+1/2, −y+1/2, −z+1; (v) −x+3/2, y+1/2, −z. |
Acknowledgements
This work was partially supported by the Swiss National Science Foundation.
References
Addison, A. W., Rao, T. N., Reedijk, J., van Rijn, J. & Verschoor, G. C. (1984). J. Chem. Soc. Dalton Trans. pp. 1349–1356. CSD CrossRef Web of Science Google Scholar
Allen, F. H. (2002). Acta Cryst. B58, 380–388. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Koo, B.-K., Bewley, L., Golub, V., Rarig, R. S., Burkholder, E., O'Conor, C. J. & Zubieta, J. (2003). Inorg. Chim. Acta, 351, 167–176. Web of Science CSD CrossRef CAS Google Scholar
Macrae, C. F., Edgington, P. R., McCabe, P., Pidcock, E., Shields, G. P., Taylor, R., Towler, M. & van de Streek, J. (2006). J. Appl. Cryst. 39, 453–457. Web of Science CSD CrossRef CAS IUCr Journals Google Scholar
Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. Web of Science CrossRef CAS IUCr Journals Google Scholar
Spek, A. L. (2009). Acta Cryst. D65, 148–155. Web of Science CrossRef CAS IUCr Journals Google Scholar
Stoe & Cie (2006). X-AREA and X-RED32. Stoe & Cie GmbH, Darmstadt, Germany. Google Scholar
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The title compound, (I), was prepared as a by-product of the reaction of 2,2':6',2''-terpyridine (= terpy) with CuCl2 in the presence of sodium sulphite. A search of the Cambridge Structural Database (CSD, Version 5.1, last update May 2010; Allen et al., 2002) for copper(II) terpyridine complexes with a water molecule coordinated to the copper(II) atom revealed 22 hits. With a chloride atom coordinated to the copper(II) atom 33 hits were obtained. Surprisingly, only one compound, involving bisterpy (= 2,2':4',4'':2'',2'''-quarterpyridyl, 6',6''-di-2-pyridine) was located with both a chloride and a water molecule coordinated to the copper(II) atom, namely [Cu2(bisterpy)(H2O)2Cl2]Cl2 (II) [Koo et al., 2003].
The structure of compound (I) is illustrated in Fig. 1. It is composed of a [(H2OClCu(terp)]+ cation that possesses mirror symmetry (with atoms Cu1, Cl1, N1, O1W and C3 lying in the mirror plane), and a Cl- anion. This anion, atom Cl2, is positionally disordered over two postions related by the mirror symmetry. A water molecule of crystallization, O2W, is also present and it too is positionally disordered over two postions related by the mirror symmetry. The bond distances and angles are similar to those in compound (II). For example, the Cu1—Cl1 and Cu1—O1W distances are 2.2255 (6) and 2.3372(19 Å, respectively, compared to 2.233 and 2.330 Å, respectively, in (II). The copper coordination sphere is distorted square pyramidal with a τ value of 0.17, compared to 0.18 in (II) [idealized values are 0 for square pyramidal and 1 for trigonal bipyramidal; Addison et al., 1984; Spek, 2009].
In the crystal of (I) the cations are linked to the anions and the water molecules of crystallization by O—H···O and O—H···Cl hydrogen bonds resulting in the formation of a two-dimensional network (Table 1 and Fig. 2). In the crystal C—H···O and C—H···Cl interactions are also present (Table 1).