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The title compound, poly­[[[di­aqua(μ-4,4′-bipyridyl)­di­nickel(II)]-bis(μ-4,4′-bipyridyl)-di-μ-hexa­oxo­di­vana­date(2−)] 2.5-hydrate], [Ni2­(V2O6)2­(C10H8N2)3­(H2O)2]·­2.5H2O, has been prepared hydro­thermally and characterized by elemental analyses, IR spectroscopy and single-crystal X-ray diffraction. The structure consists of [V2O6], [Ni­(4,4′-bipy)4O2] and [Ni­(H2O)2­(4,4′-bipy)2O2] polyhedra, and water of crystallization. The Ni atoms and one bipyridyl group lie on centres of symmetry.

Supporting information

cif

Crystallographic Information File (CIF) https://doi.org/10.1107/S0108270101006229/br1320sup1.cif
Contains datablocks global, I

hkl

Structure factor file (CIF format) https://doi.org/10.1107/S0108270101006229/br1320Isup2.hkl
Contains datablock I

CCDC reference: 169926

Comment top

There is an increasing interest in the synthesis of organic/inorganic hybrid compounds because of their novel structural architectures (Hagrman et al., 1999) and unusual electrochemical (Leroux et al., 1996) and magnetic (Lira-Cantú & Gómez-Romero, 1998) properties. Hydrothermal synthesis and structural characterization of vanadium oxide lattices containing Zn-, Cu-, and Co-bipyridyl (bipy) complexes has been intensively studied because of their large structural diversity: for example, two-dimensional layered vanadium oxide with interlayer zinc 2,2'-bipy complex, [Zn(2,2'-bipy)2]2V6O17 (Zhang et al., 1996), discrete neutral hexanuclear [Zn2V4] clusters, [{Zn(2,2'-bipy)2}2V4O12] (Zhang et al., 1997), one-dimensional vanadium oxide chain with copper 2,2'-bipy complexes, [Cu(2,2'-bipy)V2O6] and [Cu(2,2'-bipy)2V2O6] (DeBord et al., 1996) and three-dimensional bimetallic oxide network, [{Co(3,3'-bipy)2}2V4O12] (LaDuca et al., 2000). It should be noted that all the bipy ligands in these complexes are of 2,2'- and 3,3'-isomers, and no 4,4'-bipy containing compound has been observed in the vanadate/M(bipy)n system. Here we report the synthesis and crystal structure of [Ni2(4,4'-bipy)3(H2O)2V4O12]·2.5H2O, (I), which is constructed from a three-dimensional network containing {V2O6} and Ni/V-bimetallic oxide chains linked by 4,4'-bipy ligands.

Fig. 1 shows the structure of [Ni2(4,4'-bipy)3(H2O)2V4O12]·2.5H2O, which consists of [Ni1(4,4'-bipy)4O2], [V2O6], [Ni2(H2O)2(4,4'-bipy)2O2] units, and crystallization water molecules of O8, O9 and O10. The [V2O6] unit is made up of a pair of corner-sharing [VO4] tetrahedra. There are three types of oxygen atoms in the [V2O6] group: terminal O2 and O6 atoms; bridging O5 and O7 atoms connected to both V1 and V2 atoms; bridging O1 and O4 atoms linking Ni and V atoms. Table 1 lists the selected bond distances. Ni1 is coordinated by O1i and O1ii atoms from two [V2O6] groups, N1, N1iii, N2 and N2iii atoms [Ni—N 2.162 (3)–2.233 (3) Å] from four 4,4'-bipy ligands to form an Ni1O2N4 octahedron, while Ni2 is coordinated by O4 and O4iv atoms from two [V2O6] groups, N3 and N3iv atoms from two 4,4'-bipy ligands, and O3 and O3iv atoms identified as water molecules from the Ni2—O3 bond valence of 0.29 (Brown & Altermatt, 1985; Brese & O'Keeffe, 1991) to form an Ni2O4N4 octahedron. O(N)—Ni—O(N) bond angles in the Ni1O2N4 and Ni2O4N2octahedra are nearly 90° [88.7 (1)–91.3 (1)°] or ideally linear (180°). The [V2O6] group links Ni1vi and Ni2 atoms, forming a -[Ni2(H2O)2(4,4'-bipy)2]-[V2O6]- [Ni1(4,4'-bipy)4]- bimetallic chain. Two crystallographically different 4,4'-bipy groups are present: 4,4'-bipy(I) comprises N1, N3, C1–C10 atoms, and 4,4'-bipy(II) comprises N2, C11–C15 and their symmetry-related atoms. In the 4,4'-bipy(I) group, the dihedral angle between the two pyridyl rings of N1,C1–C5 and N3,C6–C10 is 35.8 (1)°. This is in contrast to the conformation between the two rings in the 4,4'-bipy(II) group which are constrained to be planar by a centre of symmetry. The 4,4'-bipy(I) links Ni1 and Ni2 atoms in two adjacent bimetallic chains, to give a two-dimensional infinite network sheet parallel to the ab plane (Fig. 1). Fig. 2 shows the crystal structure of [Ni2(4,4'-bipy)3(H2O)2V4O12]·2.5H2O viewed down the b axis. There exist two crystallographically equivalent two-dimensional network sheets, denoted by sheet A and sheet B in Fig. 2, which are stacked alternately (···ABAB···) along the c axis with an interval of 5.53 Å. Each of the 4,4'-bipy(II) groups lying in the c direction links two Ni1 atoms in two different sheets A, or equivalently sheets B. Also, the [V2O6] groups in two adjacent sheets A and B are connected through the O7 atom, to form an infinite [V2O6] chain running along the c axis.

In conclusion, it is the characteristic geometry of 4,4'-bipy, where N donors are located in two opposite ends of the ligand, that leads to the highly interlinked three-dimensional network structure. The successful preparation of the new three-dimensional network vanadium oxide cluster with a nickel complex of 4,4'-bipy ligand will extend the variety of network structures in the organic/inorganic hybrid system.

Experimental top

All reagents were of analytical grade and used without further purification. A mixture of NiCl2·6H2O (0.0880 g), NaVO3 (0.0904 g), 4,4'-bipyridyl (0.1157 g), (CH3)4NOH (0.0338 g) and H2O (10 ml) in a molar ratio 1:2:2:1:1500 was placed in a 20 ml Teflon-lined steel autoclave, and heated at 453 K for 72 h. After cooling to room temperature, green needle-like crystals were obtained in ca 70% yield based on vanadium (Found: H 3.18, C 35.09, N 8.20%; V 18.9, Ni 10.48%; calculated for Ni2V4O16.5C30N6H33: H 3.13, C 33.9, N 7.93, V 19.17, Ni 11.04%). The infrared spectrum exhibits absorption bands in the range 950–500 cm-1, attributed to VO or V—O—V stretching, and additional bands in the range 1600–1000 cm-1 assigned to 4,4'-bipy groups. Thermal gravimetric analysis shows a weight loss of 5.8% between 293 and 533 K corresponding to water of crystallization, and a further loss of 34.9% occurred between 533 and 705 K due to elemination of water O3 and the decomposition of 4,4'-bipy.

Refinement top

H atoms were defined and refined only for the 4,4'-bipy groups. Positional and Uiso parameters for H14 were fixed because of their gradual divergence during the refinement. Crystallization water molecules O8, O9, and O10 were refined with occupancies of 1/2, 1/2, and 1/4, respectively, because of too large Uiso parameters when refined on full occupancies.

Computing details top

Data collection: PROCESS-AUTO (Rigaku Corporation, 1998); cell refinement: PROCESS-AUTO; data reduction: TEXSAN (Molecular Structure Corporation, 1985, 1989); program(s) used to solve structure: SIR92 (Altomare et al., 1994); program(s) used to refine structure: TEXSAN; software used to prepare material for publication: TEXSAN.

Figures top
[Figure 1] Fig. 1. ORTEPII (Johnson, 1976) drawing of partial structure of [Ni2(4,4'-bipy)3(H2O)2V4O12]·2.5H2O. Displacement ellipsoids are drawn at the 50% probability level. H atoms in 4,4'-bipy groups are omitted for clarity. Symmetry codes: (i) x, 1 + y, z; (ii) 1/2 - x, 3/2 - y, 1 - z; (iii) 1/2 - x, 5/2 - y, 1 - z; (iv) 1 - x, 1 - y, 1 - z; (v) x, 1 - y, 1/2 + z; (vi) x, -1 + y, z.
[Figure 2] Fig. 2. Packing diagram of [Ni2(4,4'-bipy)3(H2O)2V4O12]·2.5H2O viewed along the b axis. H atoms in 4,4'-bipy groups are omitted. The primed atoms are located at symmetry-related (1/2 - x, 5/2 - y, -z) positions from unprimed atoms. Atoms in the 4,4'-bipy(II) groups and [V2O6] chains are denoted by gray circles.
(I) top
Crystal data top
[Ni2(V2O6)2(C10H8N2)3(H2O)2]·2.5H2ODx = 1.864 Mg m3
Mr = 1062.79Mo Kα radiation, λ = 0.7107 Å
Monoclinic, C2/cCell parameters from 14338 reflections
a = 30.3799 (9) Åθ = 1.9–30.0°
b = 11.2402 (3) ŵ = 2.00 mm1
c = 11.5366 (3) ÅT = 173 K
β = 105.961 (1)°Prism, green
V = 3787.6 (2) Å30.30 × 0.12 × 0.03 mm
Z = 4
Data collection top
Rigaku RAXIS-RAPID Imaging Plate
diffractometer
4198 reflections with F2 > 2.0σ(F2)
ω scansRint = 0.027
Absorption correction: multi-scan
(Higashi, 1995)
θmax = 30.0°
Tmin = 0.515, Tmax = 0.869h = 4242
14250 measured reflectionsk = 1515
5509 independent reflectionsl = 1616
Refinement top
Refinement on F2H atoms treated by a mixture of independent and constrained refinement
R[F2 > 2σ(F2)] = 0.042 w = 1/[σ2(Fo2) + (0.05P)2]
where P = (Fo2,0) + 2Fc2)/3)
wR(F2) = 0.114(Δ/σ)max = 0.002
S = 1.40Δρmax = 0.90 e Å3
4634 reflectionsΔρmin = 0.50 e Å3
312 parameters
Crystal data top
[Ni2(V2O6)2(C10H8N2)3(H2O)2]·2.5H2OV = 3787.6 (2) Å3
Mr = 1062.79Z = 4
Monoclinic, C2/cMo Kα radiation
a = 30.3799 (9) ŵ = 2.00 mm1
b = 11.2402 (3) ÅT = 173 K
c = 11.5366 (3) Å0.30 × 0.12 × 0.03 mm
β = 105.961 (1)°
Data collection top
Rigaku RAXIS-RAPID Imaging Plate
diffractometer
5509 independent reflections
Absorption correction: multi-scan
(Higashi, 1995)
4198 reflections with F2 > 2.0σ(F2)
Tmin = 0.515, Tmax = 0.869Rint = 0.027
14250 measured reflections
Refinement top
R[F2 > 2σ(F2)] = 0.042312 parameters
wR(F2) = 0.114H atoms treated by a mixture of independent and constrained refinement
S = 1.40Δρmax = 0.90 e Å3
4634 reflectionsΔρmin = 0.50 e Å3
Special details top

Refinement. Refinement using reflections with F2 > 1.0 σ(F2). The weighted R-factor (wR) and goodness of fit (S) are based on F2. R-factor (gt) are based on F. The threshold expression of F2 > 2.0 σ(F2) is used only for calculating R-factor (gt).

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/UeqOcc. (<1)
Ni10.25001.25000.50000.0155 (1)
Ni20.50000.50000.50000.0198 (1)
V10.39317 (2)0.41156 (5)0.32137 (4)0.0182 (1)
V20.35517 (2)0.40646 (5)0.56417 (4)0.0187 (1)
O10.29971 (7)0.3744 (2)0.5281 (2)0.0217 (5)
O20.38569 (10)0.2886 (3)0.6072 (3)0.0449 (8)
O30.47301 (8)0.4184 (3)0.6296 (2)0.0360 (7)
O40.44974 (8)0.4284 (3)0.3634 (2)0.0328 (7)
O50.36845 (8)0.4681 (3)0.4344 (2)0.0323 (7)
O60.3813 (1)0.2718 (3)0.3029 (3)0.0426 (8)
O70.36759 (8)0.4860 (3)0.1821 (2)0.0380 (7)
O80.4621 (4)0.175 (1)0.586 (1)0.134 (4)*0.50
O90.4730 (7)0.083 (2)0.433 (2)0.195 (7)*0.50
O100.5018 (8)0.012 (2)0.696 (2)0.108 (7)*0.25
N10.29958 (8)1.1124 (2)0.4988 (2)0.0199 (6)
N20.23974 (8)1.2679 (2)0.3017 (2)0.0189 (6)
N30.45849 (8)0.6503 (3)0.4951 (2)0.0235 (7)
C10.3238 (1)1.1127 (3)0.4189 (3)0.0281 (9)
C20.3556 (1)1.0261 (4)0.4142 (3)0.0283 (9)
C30.3644 (1)0.9345 (3)0.4971 (3)0.0227 (7)
C40.3396 (1)0.9351 (3)0.5833 (3)0.0280 (9)
C50.3082 (1)1.0240 (3)0.5805 (3)0.0260 (8)
C60.3977 (1)0.8386 (3)0.4947 (3)0.0239 (7)
C70.4035 (1)0.7933 (3)0.3881 (3)0.0282 (8)
C80.4337 (1)0.7004 (3)0.3924 (3)0.0272 (8)
C90.4528 (1)0.6947 (4)0.5970 (3)0.0370 (10)
C100.4238 (1)0.7883 (4)0.6011 (3)0.038 (1)
C110.26385 (10)1.3471 (3)0.2572 (3)0.0213 (7)
C120.2681 (1)1.3447 (3)0.1409 (3)0.0229 (7)
C130.24702 (10)1.2550 (3)0.0620 (2)0.0195 (7)
C140.2210 (1)1.1758 (3)0.1060 (3)0.0312 (9)
C150.2174 (1)1.1845 (3)0.2236 (3)0.0285 (9)
H10.320 (1)1.180 (4)0.359 (4)0.031 (10)*
H20.368 (2)1.042 (4)0.363 (4)0.05 (1)*
H30.341 (1)0.868 (4)0.636 (4)0.04 (1)*
H40.289 (1)1.025 (4)0.640 (4)0.04 (1)*
H70.382 (1)0.815 (4)0.310 (4)0.04 (1)*
H80.435 (1)0.654 (4)0.322 (4)0.04 (1)*
H90.471 (1)0.665 (4)0.669 (4)0.04 (1)*
H100.422 (1)0.805 (4)0.671 (4)0.026 (9)*
H110.280 (1)1.403 (4)0.313 (4)0.04 (1)*
H120.287 (1)1.410 (4)0.123 (4)0.03 (1)*
H140.20351.10220.06550.0317*
H150.200 (1)1.118 (4)0.256 (4)0.04 (1)*
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ni10.0164 (2)0.0154 (3)0.0160 (2)0.0004 (2)0.0067 (2)0.0007 (2)
Ni20.0172 (2)0.0232 (3)0.0182 (3)0.0050 (2)0.0033 (2)0.0012 (2)
V10.0189 (2)0.0207 (3)0.0148 (2)0.0002 (2)0.0045 (2)0.0028 (2)
V20.0169 (2)0.0251 (3)0.0143 (2)0.0003 (2)0.0045 (2)0.0021 (2)
O10.0224 (9)0.025 (1)0.0194 (10)0.0048 (8)0.0083 (8)0.0007 (9)
O20.047 (1)0.048 (2)0.035 (1)0.022 (1)0.003 (1)0.003 (1)
O30.029 (1)0.052 (2)0.028 (1)0.003 (1)0.0088 (10)0.011 (1)
O40.023 (1)0.042 (2)0.031 (1)0.002 (1)0.0041 (9)0.008 (1)
O50.038 (1)0.037 (2)0.029 (1)0.004 (1)0.022 (1)0.001 (1)
O60.065 (2)0.026 (2)0.043 (2)0.014 (1)0.026 (1)0.005 (1)
O70.032 (1)0.053 (2)0.026 (1)0.012 (1)0.0032 (10)0.018 (1)
N10.021 (1)0.018 (1)0.022 (1)0.0025 (9)0.0086 (9)0.0001 (10)
N20.022 (1)0.021 (1)0.016 (1)0.0006 (10)0.0087 (8)0.0012 (10)
N30.024 (1)0.023 (2)0.023 (1)0.005 (1)0.0062 (10)0.001 (1)
C10.032 (2)0.025 (2)0.032 (2)0.009 (1)0.017 (1)0.009 (1)
C20.032 (2)0.028 (2)0.033 (2)0.010 (1)0.022 (1)0.008 (1)
C30.025 (1)0.021 (2)0.024 (1)0.005 (1)0.009 (1)0.001 (1)
C40.036 (2)0.024 (2)0.029 (2)0.010 (1)0.017 (1)0.009 (1)
C50.030 (1)0.025 (2)0.029 (2)0.008 (1)0.018 (1)0.006 (1)
C60.026 (1)0.023 (2)0.025 (1)0.007 (1)0.011 (1)0.003 (1)
C70.031 (1)0.029 (2)0.023 (2)0.012 (1)0.004 (1)0.002 (1)
C80.035 (2)0.028 (2)0.018 (1)0.011 (1)0.006 (1)0.001 (1)
C90.041 (2)0.047 (3)0.023 (2)0.025 (2)0.008 (1)0.009 (2)
C100.048 (2)0.048 (3)0.021 (2)0.023 (2)0.015 (1)0.004 (2)
C110.025 (1)0.022 (2)0.016 (1)0.004 (1)0.005 (1)0.002 (1)
C120.025 (1)0.026 (2)0.018 (1)0.010 (1)0.006 (1)0.000 (1)
C130.024 (1)0.023 (2)0.013 (1)0.002 (1)0.0077 (10)0.002 (1)
C140.044 (2)0.030 (2)0.025 (2)0.020 (2)0.019 (1)0.011 (1)
C150.040 (2)0.028 (2)0.022 (1)0.014 (1)0.016 (1)0.007 (1)
Geometric parameters (Å, º) top
Ni1—O1i2.017 (2)C1—C21.383 (5)
Ni1—O1ii2.017 (2)C2—C31.380 (5)
Ni1—N12.162 (3)C3—C41.403 (5)
Ni1—N1iii2.162 (3)C3—C61.485 (4)
Ni1—N22.231 (2)C4—C51.375 (5)
Ni1—N2iii2.231 (2)C6—C101.385 (5)
Ni2—O42.034 (2)C6—C71.385 (5)
Ni2—O4iv2.034 (2)C7—C81.384 (5)
Ni2—N32.099 (3)C9—C101.382 (5)
Ni2—N3iv2.099 (3)C11—C121.382 (4)
Ni2—O32.103 (3)C12—C131.390 (4)
Ni2—O3iv2.103 (3)C13—C141.378 (4)
V1—O61.612 (3)C13—C13vi1.496 (6)
V1—O41.663 (2)C14—C151.393 (4)
V1—O71.788 (2)C1—H11.01 (4)
V1—O51.791 (3)C2—H20.81 (5)
V2—O21.615 (3)C4—H30.97 (5)
V2—O11.661 (2)C5—H41.02 (4)
V2—O7v1.781 (3)C7—H70.99 (4)
V2—O51.793 (3)C8—H80.98 (5)
N1—C11.329 (4)C9—H90.92 (4)
N1—C51.344 (4)C10—H100.85 (4)
N2—C111.342 (4)C11—H110.93 (4)
N2—C151.347 (4)C12—H120.98 (4)
N3—C91.332 (5)C14—H141.023
N3—C81.340 (4)C15—H151.04 (5)
O2···O82.72 (1)O9···O10viii2.13 (3)
O3···O82.78 (1)O9···O9viii2.68 (4)
O8···O92.15 (2)O9···O103.03 (3)
O8···O102.37 (3)O9···O10ix3.27 (3)
O8···O10vii3.07 (3)O10···O10vii1.28 (4)
O1i—Ni1—O1ii180.0O4—V1—O7111.6 (1)
O1i—Ni1—N190.27 (10)O4—V1—O5110.7 (1)
O1i—Ni1—N1iii89.73 (10)O7—V1—O5108.8 (1)
O1i—Ni1—N289.41 (9)O2—V2—O1110.9 (1)
O1i—Ni1—N2iii90.59 (9)O2—V2—O7v109.8 (1)
O1ii—Ni1—N189.73 (10)O2—V2—O5109.4 (1)
O1ii—Ni1—N1iii90.27 (10)O1—V2—O7v109.0 (1)
O1ii—Ni1—N290.59 (9)O1—V2—O5108.7 (1)
O1ii—Ni1—N2iii89.41 (9)O7v—V2—O5109.0 (1)
N1—Ni1—N1iii180.0C1—N1—C5116.7 (3)
N1—Ni1—N287.66 (10)C11—N2—C15115.6 (3)
N1—Ni1—N2iii92.34 (10)C9—N3—C8116.4 (3)
N1iii—Ni1—N292.34 (10)N1—C1—C2123.5 (3)
N1iii—Ni1—N2iii87.66 (10)C3—C2—C1120.1 (3)
N2—Ni1—N2iii180.0C2—C3—C4116.7 (3)
O4—Ni2—O4iv180.0C2—C3—C6122.1 (3)
O4—Ni2—N388.9 (1)C4—C3—C6121.2 (3)
O4—Ni2—N3iv91.1 (1)C5—C4—C3119.3 (3)
O4—Ni2—O391.2 (1)N1—C5—C4123.7 (3)
O4—Ni2—O3iv88.8 (1)C10—C6—C7117.1 (3)
O4iv—Ni2—N391.1 (1)C10—C6—C3120.4 (3)
O4iv—Ni2—N3iv88.9 (1)C7—C6—C3122.4 (3)
O4iv—Ni2—O388.8 (1)C8—C7—C6119.3 (3)
O4iv—Ni2—O3iv91.2 (1)N3—C8—C7123.7 (3)
N3—Ni2—N3iv180.0N3—C9—C10123.7 (3)
N3—Ni2—O391.2 (1)C9—C10—C6119.7 (3)
N3—Ni2—O3iv88.8 (1)N2—C11—C12124.4 (3)
N3iv—Ni2—O388.8 (1)C11—C12—C13120.0 (3)
N3iv—Ni2—O3iv91.2 (1)C14—C13—C12115.8 (3)
O3—Ni2—O3iv180.0C14—C13—C13vi122.5 (3)
O6—V1—O4109.0 (2)C12—C13—C13vi121.7 (4)
O6—V1—O7108.1 (1)C13—C14—C15121.3 (3)
O6—V1—O5108.6 (1)N2—C15—C14122.8 (3)
Symmetry codes: (i) x, y+1, z; (ii) x+1/2, y+3/2, z+1; (iii) x+1/2, y+5/2, z+1; (iv) x+1, y+1, z+1; (v) x, y+1, z+1/2; (vi) x+1/2, y+5/2, z; (vii) x+1, y, z+3/2; (viii) x+1, y, z+1; (ix) x, y, z1/2.

Experimental details

Crystal data
Chemical formula[Ni2(V2O6)2(C10H8N2)3(H2O)2]·2.5H2O
Mr1062.79
Crystal system, space groupMonoclinic, C2/c
Temperature (K)173
a, b, c (Å)30.3799 (9), 11.2402 (3), 11.5366 (3)
β (°) 105.961 (1)
V3)3787.6 (2)
Z4
Radiation typeMo Kα
µ (mm1)2.00
Crystal size (mm)0.30 × 0.12 × 0.03
Data collection
DiffractometerRigaku RAXIS-RAPID Imaging Plate
diffractometer
Absorption correctionMulti-scan
(Higashi, 1995)
Tmin, Tmax0.515, 0.869
No. of measured, independent and
observed [F2 > 2.0σ(F2)] reflections
14250, 5509, 4198
Rint0.027
(sin θ/λ)max1)0.703
Refinement
R[F2 > 2σ(F2)], wR(F2), S 0.042, 0.114, 1.40
No. of reflections4634
No. of parameters312
No. of restraints?
H-atom treatmentH atoms treated by a mixture of independent and constrained refinement
Δρmax, Δρmin (e Å3)0.90, 0.50

Computer programs: PROCESS-AUTO (Rigaku Corporation, 1998), PROCESS-AUTO, TEXSAN (Molecular Structure Corporation, 1985, 1989), SIR92 (Altomare et al., 1994), TEXSAN.

Selected bond lengths (Å) top
Ni1—O1i2.017 (2)Ni2—O32.103 (3)
Ni1—O1ii2.017 (2)Ni2—O3iv2.103 (3)
Ni1—N12.162 (3)V1—O61.612 (3)
Ni1—N1iii2.162 (3)V1—O41.663 (2)
Ni1—N22.231 (2)V1—O71.788 (2)
Ni1—N2iii2.231 (2)V1—O51.791 (3)
Ni2—O42.034 (2)V2—O21.615 (3)
Ni2—O4iv2.034 (2)V2—O11.661 (2)
Ni2—N32.099 (3)V2—O7v1.781 (3)
Ni2—N3iv2.099 (3)V2—O51.793 (3)
Symmetry codes: (i) x, y+1, z; (ii) x+1/2, y+3/2, z+1; (iii) x+1/2, y+5/2, z+1; (iv) x+1, y+1, z+1; (v) x, y+1, z+1/2.
 

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