Poly[aqua-(μ2-4,4'-bipyridine-κ(2) N:N')(ethane-1,2-diol-κO)(μ2-sulfato-κ(2) O:O')nickel(II)].

The title compound, [Ni(SO4)(C10H8N2)(C2H6O2)(H2O)] n , contains two crystallographically unique Ni(II) atoms, each lying on a twofold rotation axis and having a slightly distorted octa-hedral environment. It is isotypic with the previously reported Cu(II) analog [Zhong et al. (2011 ▶). Acta Cryst. C67, m62-m64]. One Ni(II) atom is coordinated by two N atoms from two bridging 4,4'-bipyridine (4,4'-bipy) ligands, two O atoms from two sulfate ions and two aqua O atoms. The second Ni(II) atom is surrounded by two N atoms from 4,4'-bipy ligands and four O atoms, two from bridging sulfate ions and from two ethane-1,2-diol ligands. The sulfate anion acts as a bridging ligand, linking adjacent Ni(II) atoms, leading to the formation of linear ⋯Ni1-Ni2-Ni1-Ni2⋯ chains along the a-axis direction. Adjacent chains are further bridged by 4,4'-bipy ligands, resulting in a two-dimensional layered polymer parallel to (001). In the crystal, the polymeric layers are linked by extensive O-H⋯O hydrogen-bonding inter-actions involving the O atoms of the water mol-ecules and the ethane-1,2-diol mol-ecules, resulting in a three-dimensional supra-molecular network.

Related literature

For Ni-(4,4′-bipy) complexes with perchlorate, citraconate or phthalate anions and a water mol­ecule as a second ligand, see: Yang et al. (2003 ▶); Kopf et al. (2005 ▶); Wang et al. (2006 ▶). For an isotypic structure, see: Zhong et al. (2011 ▶). For background to coordination polymers, see: Dietzel et al. (2005 ▶); Robin & Fromm (2006 ▶); Sarma et al. (2009 ▶); Zhang et al. (2010 ▶).

Experimental

Crystal data

[Ni(SO4)(C10H8N2)(C2H6O2)(H2O)]

M = 391.04

Monoclinic,

a = 11.022 (2) Å

b = 22.606 (5) Å

c = 12.123 (2) Å

β = 95.65 (3)°

V = 3005.9 (10) Å3

Z = 8

Mo Kα radiation

μ = 1.47 mm−1

T = 223 K

0.40 × 0.35 × 0.10 mm

Data collection

Rigaku Mercury CCD diffractometer

Absorption correction: multi-scan (REQAB; Jacobson, 1998 ▶) T min = 0.743, T max = 1.000

8555 measured reflections

3420 independent reflections

2885 reflections with I > 2σ(I)

R int = 0.024

Refinement

R[F 2 > 2σ(F 2)] = 0.033

wR(F 2) = 0.086

S = 1.06

3420 reflections

214 parameters

H-atom parameters constrained

Δρmax = 0.56 e Å−3

Δρmin = −0.41 e Å−3

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

Click here for additional data file.

Crystal structure: contains datablock(s) global, I. DOI: 10.1107/S1600536813003772/zq2195sup1.cif

Click here for additional data file.

Structure factors: contains datablock(s) I. DOI: 10.1107/S1600536813003772/zq2195Isup2.hkl

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

[Ni(SO4)(C10H8N2)(C2H6O2)(H2O)]	F(000) = 1616
Mr = 391.04	Dx = 1.728 Mg m−3
Monoclinic, C2/c	Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -C 2yc	Cell parameters from 6950 reflections
a = 11.022 (2) Å	θ = 3.3–27.5°
b = 22.606 (5) Å	µ = 1.47 mm−1
c = 12.123 (2) Å	T = 223 K
β = 95.65 (3)°	Block, green
V = 3005.9 (10) Å3	0.40 × 0.35 × 0.10 mm
Z = 8

Rigaku Mercury CCD diffractometer	3420 independent reflections
Radiation source: fine-focus sealed tube	2885 reflections with I > 2σ(I)
Graphite Monochromator monochromator	Rint = 0.024
Detector resolution: 28.5714 pixels mm-1	θmax = 27.5°, θmin = 3.3°
ω scans	h = −14→11
Absorption correction: multi-scan (REQAB; Jacobson, 1998)	k = −23→29
Tmin = 0.743, Tmax = 1.000	l = −14→15
8555 measured reflections

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)] = 0.033	H-atom parameters constrained
wR(F2) = 0.086	w = 1/[σ2(Fo2) + (0.0501P)2] where P = (Fo2 + 2Fc2)/3
S = 1.06	(Δ/σ)max < 0.001
3420 reflections	Δρmax = 0.56 e Å−3
214 parameters	Δρmin = −0.41 e Å−3
0 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: 0.0014 (2)

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.

	x	y	z	Uiso*/Ueq
Ni1	0.5000	0.379715 (14)	0.2500	0.01501 (11)
Ni2	0.0000	0.378572 (13)	0.2500	0.01544 (11)
S1	0.23450 (4)	0.39830 (2)	0.10920 (4)	0.01777 (13)
O1	0.31124 (12)	0.37951 (6)	0.21319 (12)	0.0197 (3)
O1W	0.47576 (13)	0.37522 (5)	0.41787 (12)	0.0234 (3)
H1WA	0.4323	0.3957	0.4577	0.035*
H1WB	0.5451	0.3772	0.4551	0.035*
O2	0.10883 (12)	0.37748 (5)	0.11907 (11)	0.0194 (3)
O3	0.28195 (13)	0.36860 (7)	0.01488 (13)	0.0289 (4)
O4	0.23754 (14)	0.46204 (6)	0.09809 (14)	0.0360 (4)
O5	0.15466 (13)	0.37609 (6)	0.36000 (12)	0.0233 (3)
H5B	0.2169	0.3765	0.3282	0.028*
O6	0.30832 (13)	0.43173 (6)	0.52663 (13)	0.0329 (4)
H6A	0.2989	0.4663	0.5447	0.049*
N1	0.5000	0.28676 (10)	0.2500	0.0188 (5)
N2	0.5000	0.47137 (10)	0.2500	0.0182 (5)
N3	0.0000	0.28565 (10)	0.2500	0.0213 (5)
N4	0.0000	0.47128 (10)	0.2500	0.0185 (5)
C1	0.5000	0.16183 (12)	0.2500	0.0188 (6)
C2	0.43554 (19)	0.19444 (9)	0.16563 (17)	0.0243 (4)
H2A	0.3912	0.1750	0.1072	0.029*
C3	0.43763 (19)	0.25555 (9)	0.16891 (18)	0.0245 (4)
H3A	0.3935	0.2762	0.1119	0.029*
C4	0.58066 (18)	0.50219 (9)	0.19796 (17)	0.0237 (4)
H4A	0.6383	0.4815	0.1622	0.028*
C5	0.58292 (18)	0.56309 (8)	0.19449 (17)	0.0233 (4)
H5A	0.6395	0.5825	0.1553	0.028*
C6	0.5000	0.59546 (12)	0.2500	0.0200 (6)
C7	0.0000	0.16101 (12)	0.2500	0.0215 (6)
C8	0.0906 (2)	0.19347 (9)	0.2077 (2)	0.0426 (7)
H8A	0.1540	0.1741	0.1774	0.051*
C9	0.0880 (2)	0.25446 (10)	0.2101 (2)	0.0419 (6)
H9A	0.1515	0.2749	0.1821	0.050*
C10	0.0662 (2)	0.50282 (9)	0.32806 (18)	0.0294 (5)
H10A	0.1126	0.4824	0.3839	0.035*
C11	0.0692 (2)	0.56365 (9)	0.33016 (18)	0.0282 (5)
H11A	0.1180	0.5831	0.3857	0.034*
C12	0.0000	0.59610 (12)	0.2500	0.0187 (5)
C13	0.18041 (19)	0.35033 (9)	0.46738 (18)	0.0274 (5)
H13A	0.2502	0.3242	0.4675	0.033*
H13B	0.1111	0.3271	0.4854	0.033*
C14	0.2067 (2)	0.39774 (10)	0.55251 (19)	0.0317 (5)
H14A	0.1360	0.4232	0.5542	0.038*
H14B	0.2239	0.3800	0.6252	0.038*

	U11	U22	U33	U12	U13	U23
Ni1	0.01408 (18)	0.01323 (17)	0.0177 (2)	0.000	0.00165 (14)	0.000
Ni2	0.01432 (18)	0.01335 (18)	0.0185 (2)	0.000	0.00093 (14)	0.000
S1	0.0155 (2)	0.0190 (2)	0.0187 (2)	−0.00140 (18)	0.00098 (17)	0.00331 (18)
O1	0.0152 (7)	0.0260 (7)	0.0178 (7)	0.0001 (5)	0.0010 (6)	0.0034 (5)
O1W	0.0197 (7)	0.0294 (8)	0.0213 (8)	0.0027 (6)	0.0036 (6)	−0.0021 (6)
O2	0.0146 (6)	0.0232 (7)	0.0202 (7)	−0.0016 (5)	0.0009 (6)	−0.0005 (5)
O3	0.0194 (7)	0.0480 (10)	0.0199 (8)	0.0001 (6)	0.0041 (6)	−0.0026 (6)
O4	0.0342 (8)	0.0204 (7)	0.0514 (11)	−0.0054 (6)	−0.0058 (8)	0.0132 (7)
O5	0.0181 (7)	0.0333 (8)	0.0185 (7)	0.0006 (6)	0.0023 (6)	0.0034 (6)
O6	0.0302 (8)	0.0303 (8)	0.0389 (9)	−0.0006 (6)	0.0072 (7)	−0.0136 (7)
N1	0.0188 (11)	0.0154 (11)	0.0217 (12)	0.000	−0.0005 (9)	0.000
N2	0.0180 (11)	0.0151 (10)	0.0213 (12)	0.000	0.0012 (9)	0.000
N3	0.0220 (11)	0.0133 (10)	0.0288 (13)	0.000	0.0041 (10)	0.000
N4	0.0178 (11)	0.0170 (11)	0.0206 (12)	0.000	0.0021 (9)	0.000
C1	0.0193 (13)	0.0183 (13)	0.0193 (14)	0.000	0.0043 (11)	0.000
C2	0.0290 (10)	0.0186 (9)	0.0235 (11)	−0.0018 (8)	−0.0060 (9)	−0.0013 (8)
C3	0.0284 (10)	0.0197 (10)	0.0240 (11)	−0.0003 (9)	−0.0038 (9)	0.0012 (8)
C4	0.0241 (10)	0.0215 (10)	0.0259 (11)	−0.0009 (8)	0.0050 (9)	−0.0019 (8)
C5	0.0241 (10)	0.0202 (9)	0.0268 (11)	−0.0009 (8)	0.0076 (9)	0.0021 (8)
C6	0.0220 (13)	0.0174 (13)	0.0201 (14)	0.000	−0.0003 (11)	0.000
C7	0.0230 (14)	0.0190 (13)	0.0226 (15)	0.000	0.0021 (11)	0.000
C8	0.0407 (13)	0.0191 (10)	0.0735 (19)	0.0030 (10)	0.0328 (14)	−0.0012 (12)
C9	0.0388 (13)	0.0214 (10)	0.0711 (19)	−0.0001 (10)	0.0327 (13)	0.0020 (12)
C10	0.0376 (12)	0.0189 (10)	0.0287 (12)	0.0023 (9)	−0.0120 (10)	−0.0003 (9)
C11	0.0351 (12)	0.0214 (10)	0.0254 (11)	−0.0019 (9)	−0.0106 (9)	−0.0030 (8)
C12	0.0191 (13)	0.0158 (12)	0.0217 (14)	0.000	0.0041 (11)	0.000
C13	0.0284 (11)	0.0268 (11)	0.0265 (11)	−0.0012 (9)	0.0003 (9)	0.0094 (9)
C14	0.0303 (11)	0.0416 (13)	0.0240 (11)	−0.0020 (10)	0.0066 (9)	−0.0008 (10)

Ni1—N2	2.072 (2)	C1—C2i	1.397 (2)
Ni1—O1W	2.0809 (15)	C1—C2	1.397 (2)
Ni1—O1Wi	2.0809 (15)	C1—C12iii	1.486 (4)
Ni1—O1	2.0844 (14)	C2—C3	1.382 (3)
Ni1—O1i	2.0844 (14)	C2—H2A	0.9300
Ni1—N1	2.101 (2)	C3—H3A	0.9300
Ni2—O5	2.0591 (15)	C4—C5	1.378 (3)
Ni2—O5ii	2.0591 (15)	C4—H4A	0.9300
Ni2—O2ii	2.0817 (15)	C5—C6	1.395 (2)
Ni2—O2	2.0817 (15)	C5—H5A	0.9300
Ni2—N4	2.096 (2)	C6—C5i	1.395 (2)
Ni2—N3	2.101 (2)	C6—C7iv	1.482 (4)
S1—O4	1.4480 (15)	C7—C8	1.378 (3)
S1—O3	1.4660 (16)	C7—C8ii	1.378 (3)
S1—O2	1.4788 (14)	C7—C6v	1.482 (4)
S1—O1	1.5084 (15)	C8—C9	1.379 (3)
O1W—H1WA	0.8500	C8—H8A	0.9300
O1W—H1WB	0.8500	C9—H9A	0.9300
O5—C13	1.429 (2)	C10—C11	1.376 (3)
O5—H5B	0.8200	C10—H10A	0.9300
O6—C14	1.419 (3)	C11—C12	1.385 (2)
O6—H6A	0.8200	C11—H11A	0.9300
N1—C3	1.343 (2)	C12—C11ii	1.385 (2)
N1—C3i	1.343 (2)	C12—C1vi	1.486 (4)
N2—C4i	1.336 (2)	C13—C14	1.496 (3)
N2—C4	1.336 (2)	C13—H13A	0.9700
N3—C9ii	1.328 (3)	C13—H13B	0.9700
N3—C9	1.328 (3)	C14—H14A	0.9700
N4—C10	1.342 (2)	C14—H14B	0.9700
N4—C10ii	1.342 (2)
N2—Ni1—O1W	92.80 (4)	C9—N3—Ni2	122.06 (13)
N2—Ni1—O1Wi	92.80 (4)	C10—N4—C10ii	115.8 (2)
O1W—Ni1—O1Wi	174.41 (7)	C10—N4—Ni2	122.10 (12)
N2—Ni1—O1	90.13 (4)	C10ii—N4—Ni2	122.10 (12)
O1W—Ni1—O1	89.30 (6)	C2i—C1—C2	116.3 (2)
O1Wi—Ni1—O1	90.69 (6)	C2i—C1—C12iii	121.85 (12)
N2—Ni1—O1i	90.13 (4)	C2—C1—C12iii	121.85 (12)
O1W—Ni1—O1i	90.69 (6)	C3—C2—C1	120.03 (18)
O1Wi—Ni1—O1i	89.30 (6)	C3—C2—H2A	120.0
O1—Ni1—O1i	179.74 (7)	C1—C2—H2A	120.0
N2—Ni1—N1	180.0	N1—C3—C2	123.50 (18)
O1W—Ni1—N1	87.20 (4)	N1—C3—H3A	118.2
O1Wi—Ni1—N1	87.20 (4)	C2—C3—H3A	118.2
O1—Ni1—N1	89.87 (4)	N2—C4—C5	123.4 (2)
O1i—Ni1—N1	89.87 (4)	N2—C4—H4A	118.3
O5—Ni2—O5ii	176.88 (7)	C5—C4—H4A	118.3
O5—Ni2—O2ii	90.48 (6)	C4—C5—C6	119.7 (2)
O5ii—Ni2—O2ii	89.49 (6)	C4—C5—H5A	120.2
O5—Ni2—O2	89.49 (6)	C6—C5—H5A	120.2
O5ii—Ni2—O2	90.48 (6)	C5i—C6—C5	116.7 (3)
O2ii—Ni2—O2	178.64 (7)	C5i—C6—C7iv	121.66 (13)
O5—Ni2—N4	91.56 (4)	C5—C6—C7iv	121.66 (13)
O5ii—Ni2—N4	91.56 (4)	C8—C7—C8ii	115.6 (3)
O2ii—Ni2—N4	90.68 (3)	C8—C7—C6v	122.18 (13)
O2—Ni2—N4	90.68 (3)	C8ii—C7—C6v	122.18 (13)
O5—Ni2—N3	88.44 (4)	C7—C8—C9	120.5 (2)
O5ii—Ni2—N3	88.44 (4)	C7—C8—H8A	119.8
O2ii—Ni2—N3	89.32 (3)	C9—C8—H8A	119.8
O2—Ni2—N3	89.32 (3)	N3—C9—C8	123.7 (2)
N4—Ni2—N3	180.0	N3—C9—H9A	118.1
O4—S1—O3	111.71 (10)	C8—C9—H9A	118.1
O4—S1—O2	110.77 (8)	N4—C10—C11	123.70 (19)
O3—S1—O2	109.04 (9)	N4—C10—H10A	118.2
O4—S1—O1	109.99 (8)	C11—C10—H10A	118.2
O3—S1—O1	108.01 (8)	C10—C11—C12	120.37 (19)
O2—S1—O1	107.18 (8)	C10—C11—H11A	119.8
S1—O1—Ni1	130.10 (9)	C12—C11—H11A	119.8
Ni1—O1W—H1WA	131.5	C11ii—C12—C11	116.1 (3)
Ni1—O1W—H1WB	108.7	C11ii—C12—C1vi	121.97 (13)
H1WA—O1W—H1WB	101.4	C11—C12—C1vi	121.97 (13)
S1—O2—Ni2	132.26 (9)	O5—C13—C14	110.12 (17)
C13—O5—Ni2	132.74 (12)	O5—C13—H13A	109.6
C13—O5—H5B	109.5	C14—C13—H13A	109.6
Ni2—O5—H5B	111.9	O5—C13—H13B	109.6
C14—O6—H6A	109.5	C14—C13—H13B	109.6
C3—N1—C3i	116.6 (2)	H13A—C13—H13B	108.2
C3—N1—Ni1	121.69 (12)	O6—C14—C13	109.80 (18)
C3i—N1—Ni1	121.69 (12)	O6—C14—H14A	109.7
C4i—N2—C4	117.1 (2)	C13—C14—H14A	109.7
C4i—N2—Ni1	121.44 (12)	O6—C14—H14B	109.7
C4—N2—Ni1	121.44 (12)	C13—C14—H14B	109.7
C9ii—N3—C9	115.9 (3)	H14A—C14—H14B	108.2
C9ii—N3—Ni2	122.06 (13)
O4—S1—O1—Ni1	−70.98 (12)	O2ii—Ni2—N3—C9ii	24.04 (16)
O3—S1—O1—Ni1	51.16 (12)	O2—Ni2—N3—C9ii	−155.96 (16)
O2—S1—O1—Ni1	168.52 (9)	O5—Ni2—N3—C9	−65.47 (16)
N2—Ni1—O1—S1	68.28 (10)	O5ii—Ni2—N3—C9	114.53 (16)
O1W—Ni1—O1—S1	161.08 (10)	O2ii—Ni2—N3—C9	−155.96 (16)
O1Wi—Ni1—O1—S1	−24.52 (10)	O2—Ni2—N3—C9	24.04 (16)
N1—Ni1—O1—S1	−111.72 (10)	O5—Ni2—N4—C10	−15.81 (13)
O4—S1—O2—Ni2	−76.72 (13)	O5ii—Ni2—N4—C10	164.19 (13)
O3—S1—O2—Ni2	159.96 (10)	O2ii—Ni2—N4—C10	74.68 (13)
O1—S1—O2—Ni2	43.28 (12)	O2—Ni2—N4—C10	−105.32 (13)
O5—Ni2—O2—S1	−27.71 (11)	O5—Ni2—N4—C10ii	164.19 (13)
O5ii—Ni2—O2—S1	155.42 (10)	O5ii—Ni2—N4—C10ii	−15.81 (13)
N4—Ni2—O2—S1	63.85 (10)	O2ii—Ni2—N4—C10ii	−105.32 (13)
N3—Ni2—O2—S1	−116.15 (10)	O2—Ni2—N4—C10ii	74.68 (13)
O2ii—Ni2—O5—C13	31.31 (16)	C2i—C1—C2—C3	−0.18 (15)
O2—Ni2—O5—C13	−147.33 (16)	C12iii—C1—C2—C3	179.82 (15)
N4—Ni2—O5—C13	122.01 (16)	C3i—N1—C3—C2	−0.20 (16)
N3—Ni2—O5—C13	−57.99 (16)	Ni1—N1—C3—C2	179.80 (16)
O1W—Ni1—N1—C3	135.88 (12)	C1—C2—C3—N1	0.4 (3)
O1Wi—Ni1—N1—C3	−44.12 (12)	C4i—N2—C4—C5	−0.94 (14)
O1—Ni1—N1—C3	46.58 (12)	Ni1—N2—C4—C5	179.06 (14)
O1i—Ni1—N1—C3	−133.42 (12)	N2—C4—C5—C6	1.9 (3)
O1W—Ni1—N1—C3i	−44.12 (12)	C4—C5—C6—C5i	−0.87 (13)
O1Wi—Ni1—N1—C3i	135.88 (12)	C4—C5—C6—C7iv	179.13 (13)
O1—Ni1—N1—C3i	−133.42 (12)	C8ii—C7—C8—C9	0.6 (2)
O1i—Ni1—N1—C3i	46.58 (12)	C6v—C7—C8—C9	−179.4 (2)
O1W—Ni1—N2—C4i	−43.57 (11)	C9ii—N3—C9—C8	0.6 (2)
O1Wi—Ni1—N2—C4i	136.43 (11)	Ni2—N3—C9—C8	−179.4 (2)
O1—Ni1—N2—C4i	45.73 (11)	C7—C8—C9—N3	−1.2 (4)
O1i—Ni1—N2—C4i	−134.27 (11)	C10ii—N4—C10—C11	−0.58 (17)
O1W—Ni1—N2—C4	136.43 (11)	Ni2—N4—C10—C11	179.42 (17)
O1Wi—Ni1—N2—C4	−43.57 (11)	N4—C10—C11—C12	1.2 (3)
O1—Ni1—N2—C4	−134.27 (11)	C10—C11—C12—C11ii	−0.54 (16)
O1i—Ni1—N2—C4	45.73 (11)	C10—C11—C12—C1vi	179.46 (16)
O5—Ni2—N3—C9ii	114.53 (16)	Ni2—O5—C13—C14	−114.44 (17)
O5ii—Ni2—N3—C9ii	−65.47 (16)	O5—C13—C14—O6	−59.5 (2)

D—H···A	D—H	H···A	D···A	D—H···A
O6—H6A···O4vii	0.82	1.89	2.694 (2)	165
O5—H5B···O1	0.82	1.82	2.599 (2)	158
O1W—H1WA···O6	0.85	1.86	2.693 (2)	167
O1W—H1WB···O3i	0.85	1.91	2.718 (2)	157

Table 1

Selected bond lengths (Å)

Ni1—N2	2.072 (2)
Ni1—O1W	2.0809 (15)
Ni1—O1	2.0844 (14)
Ni1—N1	2.101 (2)
Ni2—O5	2.0591 (15)
Ni2—O2	2.0817 (15)
Ni2—N4	2.096 (2)
Ni2—N3	2.101 (2)

Table 2

Hydrogen-bond geometry (Å, °)

D—H⋯A	D—H	H⋯A	D⋯A	D—H⋯A
O6—H6A⋯O4i	0.82	1.89	2.694 (2)	165
O5—H5B⋯O1	0.82	1.82	2.599 (2)	158
O1W—H1WA⋯O6	0.85	1.86	2.693 (2)	167
O1W—H1WB⋯O3ii	0.85	1.91	2.718 (2)	157

Symmetry codes: (i) ; (ii) .