Poly[[tetra-aqua-bis[μ(3)-1-ethyl-6-fluoro-4-oxo-7-(piperazinium-1-yl)-1H-quinoline-3-carboxyl-ato]dinickel(II)] hydroxide nitrate].

In the title compound, [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](OH)(NO(3)), the cationic [Ni(2)(C(16)H(18)FN(3)O(3))(2)(H(2)O)(4)](2+) building units are linked through Ni-O(carboxyl-ate) and Ni-N(amino) bridges into a layer structure. The two independent nickel atoms lie on inversion centres: one adopts an NiO(6) octa-hedral geometry, the other a trans-NiN(2)O(4) octahedral arrangement. The charge-balancing hydroxide and nitrate ions are of half site occupancy each. A network of O-H⋯O and N-H⋯O hydrogen bonds helps to establish the packing.

Related literature

For related structures, see Barbas et al. (2007 ▶); Florence et al. (2000 ▶). For medical background on norfloxacin, see Goldstein (1987 ▶).

Experimental

Crystal data

[Ni2(C16H18FN3O3)2(H2O)4](NO3)(OH)

M = 907.17

Triclinic,

a = 8.9633 (2) Å

b = 9.8121 (2) Å

c = 13.2119 (3) Å

α = 101.504 (2)°

β = 106.301 (2)°

γ = 113.528 (2)°

V = 956.34 (4) Å3

Z = 1

Mo Kα radiation

μ = 1.07 mm−1

T = 295 (2) K

0.18 × 0.16 × 0.15 mm

Data collection

Bruker APEXII diffractometer

Absorption correction: multi-scan (SADABS; Sheldrick, 1996 ▶) T min = 0.686, T max = 0.856

11320 measured reflections

4304 independent reflections

2869 reflections with I > 2σ(I)

R int = 0.051

Refinement

R[F 2 > 2σ(F 2)] = 0.069

wR(F 2) = 0.219

S = 1.03

4304 reflections

280 parameters

34 restraints

H-atom parameters constrained

Δρmax = 1.65 e Å−3

Δρmin = −0.59 e Å−3

Data collection: APEX2 (Bruker, 2004 ▶); cell refinement: SAINT (Bruker, 2004 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997 ▶); molecular graphics: X-SEED (Barbour, 2001 ▶); software used to prepare material for publication: publCIF (Westrip, 2008 ▶).

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536807062885/hb2663sup1.cif

Structure factors: contains datablocks I. DOI: 10.1107/S1600536807062885/hb2663Isup2.hkl

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

[Ni2(C16H18FN3O3)2(H2O)4](NO3)(OH)	Z = 1
Mr = 907.17	F(000) = 472
Triclinic, P1	Dx = 1.575 Mg m−3
Hall symbol: -P 1	Mo Kα radiation, λ = 0.71073 Å
a = 8.9633 (2) Å	Cell parameters from 2076 reflections
b = 9.8121 (2) Å	θ = 2.6–28.0°
c = 13.2119 (3) Å	µ = 1.07 mm−1
α = 101.504 (2)°	T = 295 K
β = 106.301 (2)°	Block, blue
γ = 113.528 (2)°	0.18 × 0.16 × 0.15 mm
V = 956.34 (4) Å3

Bruker APEXII diffractometer	4304 independent reflections
Radiation source: medium-focus sealed tube	2869 reflections with I > 2σ(I)
graphite	Rint = 0.051
φ and ω scans	θmax = 27.5°, θmin = 2.6°
Absorption correction: multi-scan (SADABS; Sheldrick, 1996)	h = −11→11
Tmin = 0.686, Tmax = 0.856	k = −12→12
11320 measured reflections	l = −17→17

Refinement on F2	Primary atom site location: structure-invariant direct methods
Least-squares matrix: full	Secondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.069	Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.219	H-atom parameters constrained
S = 1.03	w = 1/[σ2(Fo2) + (0.1076P)2 + 1.3612P] where P = (Fo2 + 2Fc2)/3
4304 reflections	(Δ/σ)max = 0.001
280 parameters	Δρmax = 1.65 e Å−3
34 restraints	Δρmin = −0.59 e Å−3

	x	y	z	Uiso*/Ueq	Occ. (<1)
Ni1	0.5000	0.5000	0.5000	0.0328 (3)
Ni2	1.0000	1.0000	0.5000	0.0362 (3)
F1	0.8924 (5)	1.1417 (4)	0.0053 (3)	0.0597 (10)
O1	0.5117 (4)	0.6049 (4)	0.3832 (3)	0.0403 (9)
O2	0.7870 (5)	0.8001 (5)	0.4694 (3)	0.0522 (11)
O3	0.9054 (5)	0.9832 (5)	0.3374 (3)	0.0450 (10)
O1w	0.7762 (5)	0.5892 (5)	0.5746 (3)	0.0516 (10)
H1w1	0.8119	0.6231	0.6459	0.077*
H1w2	0.8280	0.6650	0.5537	0.077*
O2w	1.4635 (5)	0.9364 (5)	0.4764 (3)	0.079 (3)	0.50
H2w	1.4173	0.8742	0.4083	0.118*	0.50
O3w	1.1392 (8)	0.8776 (7)	0.4696 (5)	0.0892 (17)
H3w1	1.2209	0.9326	0.4513	0.134*
H3w2	1.0678	0.7887	0.4163	0.134*
N1	0.4068 (5)	0.6750 (5)	0.0911 (3)	0.0353 (9)
N2	0.5693 (6)	0.9176 (6)	−0.1764 (3)	0.0445 (11)
H2n	0.5624	1.0037	−0.1616	0.053*
N3	0.5140 (6)	0.7018 (5)	−0.3881 (4)	0.0399 (10)
H3n	0.4886	0.7535	−0.4294	0.048*
C1	0.6428 (6)	0.7216 (6)	0.3853 (4)	0.0355 (11)
C2	0.6166 (6)	0.7618 (6)	0.2808 (4)	0.0343 (11)
C3	0.4548 (7)	0.6655 (6)	0.1942 (4)	0.0372 (11)
H3	0.3704	0.5865	0.2075	0.045*
C4	0.7510 (6)	0.8857 (6)	0.2651 (4)	0.0330 (10)
C5	0.6994 (6)	0.8949 (6)	0.1519 (4)	0.0324 (10)
C6	0.8197 (7)	1.0130 (6)	0.1263 (4)	0.0378 (11)
H6	0.9307	1.0882	0.1824	0.045*
C7	0.7757 (7)	1.0182 (6)	0.0216 (4)	0.0400 (12)
C8	0.6112 (7)	0.9076 (6)	−0.0698 (4)	0.0367 (11)
C9	0.4899 (7)	0.7932 (6)	−0.0432 (4)	0.0360 (11)
H9	0.3790	0.7186	−0.0996	0.043*
C10	0.5301 (6)	0.7878 (6)	0.0651 (4)	0.0328 (10)
C11	0.2248 (7)	0.5575 (7)	0.0058 (5)	0.0445 (13)
H11A	0.1846	0.6056	−0.0457	0.053*
H11B	0.1444	0.5287	0.0434	0.053*
C12	0.2190 (9)	0.4110 (8)	−0.0597 (6)	0.0684 (19)
H12A	0.0997	0.3378	−0.1137	0.103*
H12B	0.2569	0.3622	−0.0091	0.103*
H12C	0.2965	0.4389	−0.0984	0.103*
C13	0.6999 (9)	0.9619 (7)	−0.2271 (5)	0.0551 (16)
H13A	0.8181	1.0297	−0.1679	0.066*
H13B	0.6758	1.0214	−0.2739	0.066*
C14	0.6927 (7)	0.8160 (7)	−0.2977 (4)	0.0481 (14)
H14A	0.7776	0.8489	−0.3319	0.058*
H14B	0.7280	0.7627	−0.2490	0.058*
C15	0.3826 (7)	0.6632 (7)	−0.3352 (4)	0.0431 (12)
H15A	0.4053	0.6045	−0.2873	0.052*
H15B	0.2638	0.5959	−0.3938	0.052*
C16	0.3921 (8)	0.8111 (8)	−0.2659 (5)	0.0489 (14)
H16A	0.3623	0.8665	−0.3147	0.059*
H16B	0.3056	0.7812	−0.2327	0.059*
O4	0.9439 (11)	0.5634 (8)	0.7796 (6)	0.0490 (19)	0.50
O5	1.0325 (17)	0.4310 (17)	0.6823 (12)	0.126 (5)	0.50
O6	0.8282 (11)	0.3095 (10)	0.7300 (8)	0.063 (2)	0.50
N4	0.9354 (9)	0.4383 (9)	0.7316 (5)	0.046 (2)	0.50

	U11	U22	U33	U12	U13	U23
Ni1	0.0328 (5)	0.0316 (5)	0.0269 (5)	0.0082 (4)	0.0117 (4)	0.0128 (4)
Ni2	0.0337 (5)	0.0332 (5)	0.0259 (5)	0.0042 (4)	0.0075 (4)	0.0122 (4)
F1	0.074 (2)	0.0439 (19)	0.0362 (17)	0.0039 (17)	0.0227 (16)	0.0180 (15)
O1	0.0361 (19)	0.040 (2)	0.0340 (18)	0.0079 (16)	0.0113 (15)	0.0198 (16)
O2	0.044 (2)	0.050 (2)	0.0309 (19)	−0.0013 (18)	0.0047 (16)	0.0212 (18)
O3	0.0351 (19)	0.045 (2)	0.0303 (18)	0.0017 (17)	0.0050 (15)	0.0163 (17)
O1w	0.041 (2)	0.051 (2)	0.053 (2)	0.0136 (19)	0.0144 (18)	0.024 (2)
O2w	0.069 (7)	0.093 (9)	0.067 (7)	0.037 (7)	0.024 (6)	0.024 (7)
O3w	0.084 (4)	0.093 (4)	0.094 (4)	0.050 (3)	0.034 (3)	0.028 (3)
N1	0.029 (2)	0.041 (2)	0.029 (2)	0.0115 (18)	0.0106 (16)	0.0132 (18)
N2	0.064 (3)	0.041 (3)	0.028 (2)	0.024 (2)	0.018 (2)	0.015 (2)
N3	0.046 (3)	0.035 (2)	0.034 (2)	0.013 (2)	0.0175 (19)	0.0142 (19)
C1	0.037 (3)	0.037 (3)	0.028 (2)	0.013 (2)	0.013 (2)	0.014 (2)
C2	0.035 (3)	0.035 (3)	0.027 (2)	0.012 (2)	0.0110 (19)	0.013 (2)
C3	0.037 (3)	0.040 (3)	0.037 (3)	0.015 (2)	0.019 (2)	0.020 (2)
C4	0.036 (3)	0.033 (3)	0.029 (2)	0.015 (2)	0.013 (2)	0.014 (2)
C5	0.035 (2)	0.033 (3)	0.027 (2)	0.013 (2)	0.0120 (19)	0.013 (2)
C6	0.035 (3)	0.035 (3)	0.031 (2)	0.009 (2)	0.012 (2)	0.009 (2)
C7	0.048 (3)	0.033 (3)	0.034 (3)	0.012 (2)	0.018 (2)	0.015 (2)
C8	0.048 (3)	0.039 (3)	0.031 (2)	0.025 (2)	0.017 (2)	0.017 (2)
C9	0.037 (3)	0.035 (3)	0.027 (2)	0.014 (2)	0.0076 (19)	0.010 (2)
C10	0.036 (3)	0.034 (3)	0.029 (2)	0.017 (2)	0.0125 (19)	0.012 (2)
C11	0.029 (3)	0.056 (3)	0.037 (3)	0.014 (2)	0.007 (2)	0.017 (3)
C12	0.056 (4)	0.046 (4)	0.069 (5)	0.011 (3)	0.009 (3)	0.004 (3)
C13	0.072 (4)	0.039 (3)	0.031 (3)	0.006 (3)	0.022 (3)	0.012 (2)
C14	0.045 (3)	0.044 (3)	0.033 (3)	0.002 (3)	0.019 (2)	0.007 (2)
C15	0.044 (3)	0.047 (3)	0.033 (3)	0.020 (3)	0.015 (2)	0.009 (2)
C16	0.062 (4)	0.067 (4)	0.032 (3)	0.043 (3)	0.017 (3)	0.021 (3)
O4	0.062 (5)	0.030 (4)	0.038 (4)	0.019 (3)	0.006 (3)	0.005 (3)
O5	0.126 (8)	0.116 (8)	0.138 (8)	0.022 (5)	0.098 (7)	0.060 (7)
O6	0.057 (5)	0.046 (5)	0.080 (6)	0.016 (4)	0.029 (4)	0.026 (4)
N4	0.044 (5)	0.058 (5)	0.048 (5)	0.026 (4)	0.018 (4)	0.037 (4)

Ni1—O1	2.022 (3)	C1—C2	1.492 (6)
Ni1—O1i	2.022 (3)	C2—C3	1.359 (7)
Ni1—O1w	2.103 (4)	C2—C4	1.430 (6)
Ni1—O1wi	2.103 (4)	C3—H3	0.9300
Ni1—N3ii	2.157 (5)	C4—C5	1.468 (6)
Ni1—N3iii	2.157 (5)	C5—C6	1.408 (6)
Ni2—O2	1.979 (4)	C5—C10	1.411 (7)
Ni2—O2iv	1.979 (4)	C6—C7	1.345 (7)
Ni2—O3iv	2.021 (3)	C6—H6	0.9300
Ni2—O3	2.021 (3)	C7—C8	1.418 (7)
Ni2—O3wiv	2.108 (6)	C8—C9	1.401 (7)
Ni2—O3w	2.108 (6)	C9—C10	1.390 (6)
F1—C7	1.352 (6)	C9—H9	0.9300
O1—C1	1.260 (6)	C11—C12	1.496 (10)
O2—C1	1.247 (6)	C11—H11A	0.9700
O3—C4	1.256 (6)	C11—H11B	0.9700
O1w—H1w1	0.8501	C12—H12A	0.9600
O1w—H1w2	0.8500	C12—H12B	0.9600
O2w—O2wv	1.088 (8)	C12—H12C	0.9600
O2w—H2w	0.8500	C13—C14	1.511 (9)
O3w—H3w1	0.8501	C13—H13A	0.9700
O3w—H3w2	0.8501	C13—H13B	0.9700
N1—C3	1.343 (6)	C14—H14A	0.9700
N1—C10	1.398 (6)	C14—H14B	0.9700
N1—C11	1.486 (6)	C15—C16	1.509 (8)
N2—C8	1.387 (6)	C15—H15A	0.9700
N2—C16	1.463 (7)	C15—H15B	0.9700
N2—C13	1.469 (7)	C16—H16A	0.9700
N2—H2n	0.8600	C16—H16B	0.9700
N3—C14	1.485 (7)	O4—N4	1.225 (8)
N3—C15	1.493 (7)	O5—N4	1.241 (9)
N3—Ni1vi	2.157 (5)	O6—N4	1.237 (8)
N3—H3n	0.8600
O1—Ni1—O1i	180.000 (1)	N1—C3—H3	117.3
O1—Ni1—O1w	94.08 (14)	C2—C3—H3	117.3
O1i—Ni1—O1w	85.92 (14)	O3—C4—C2	126.4 (4)
O1—Ni1—O1wi	85.92 (14)	O3—C4—C5	118.6 (4)
O1i—Ni1—O1wi	94.08 (14)	C2—C4—C5	115.0 (4)
O1w—Ni1—O1wi	180.0	C6—C5—C10	117.4 (4)
O1—Ni1—N3iii	89.36 (15)	C6—C5—C4	120.4 (4)
O1i—Ni1—N3iii	90.64 (15)	C10—C5—C4	122.2 (4)
O1w—Ni1—N3iii	87.36 (16)	C7—C6—C5	120.7 (5)
O1wi—Ni1—N3iii	92.64 (16)	C7—C6—H6	119.7
O1—Ni1—N3ii	90.64 (15)	C5—C6—H6	119.7
O1i—Ni1—N3ii	89.36 (15)	C6—C7—F1	117.3 (5)
O1w—Ni1—N3ii	92.64 (16)	C6—C7—C8	123.8 (4)
O1wi—Ni1—N3ii	87.36 (16)	F1—C7—C8	118.8 (4)
N3iii—Ni1—N3ii	180.0 (2)	N2—C8—C9	122.3 (5)
O2iv—Ni2—O2	180.0	N2—C8—C7	122.3 (4)
O2iv—Ni2—O3iv	91.12 (14)	C9—C8—C7	115.3 (4)
O2—Ni2—O3iv	88.88 (14)	C10—C9—C8	122.0 (5)
O2iv—Ni2—O3	88.88 (14)	C10—C9—H9	119.0
O2—Ni2—O3	91.12 (14)	C8—C9—H9	119.0
O3iv—Ni2—O3	180.000 (1)	C9—C10—N1	121.5 (4)
O2iv—Ni2—O3wiv	91.8 (2)	C9—C10—C5	120.7 (4)
O2—Ni2—O3wiv	88.2 (2)	N1—C10—C5	117.8 (4)
O3iv—Ni2—O3wiv	92.6 (2)	N1—C11—C12	111.7 (5)
O3—Ni2—O3wiv	87.4 (2)	N1—C11—H11A	109.3
O2iv—Ni2—O3w	88.2 (2)	C12—C11—H11A	109.3
O2—Ni2—O3w	91.8 (2)	N1—C11—H11B	109.3
O3iv—Ni2—O3w	87.4 (2)	C12—C11—H11B	109.3
O3—Ni2—O3w	92.6 (2)	H11A—C11—H11B	107.9
O3wiv—Ni2—O3w	180.000 (3)	C11—C12—H12A	109.5
C1—O1—Ni1	128.4 (3)	C11—C12—H12B	109.5
C1—O2—Ni2	130.1 (3)	H12A—C12—H12B	109.5
C4—O3—Ni2	125.3 (3)	C11—C12—H12C	109.5
Ni1—O1w—H1w1	109.5	H12A—C12—H12C	109.5
Ni1—O1w—H1w2	109.5	H12B—C12—H12C	109.5
H1w1—O1w—H1w2	109.5	N2—C13—C14	110.9 (4)
O2wv—O2w—H2w	138.4	N2—C13—H13A	109.5
Ni2—O3w—H3w1	109.5	C14—C13—H13A	109.5
Ni2—O3w—H3w2	109.4	N2—C13—H13B	109.5
H3w1—O3w—H3w2	109.5	C14—C13—H13B	109.5
C3—N1—C10	119.8 (4)	H13A—C13—H13B	108.0
C3—N1—C11	118.1 (4)	N3—C14—C13	113.3 (5)
C10—N1—C11	122.0 (4)	N3—C14—H14A	108.9
C8—N2—C16	120.9 (4)	C13—C14—H14A	108.9
C8—N2—C13	122.5 (5)	N3—C14—H14B	108.9
C16—N2—C13	109.1 (4)	C13—C14—H14B	108.9
C8—N2—H2n	99.1	H14A—C14—H14B	107.7
C16—N2—H2n	99.1	N3—C15—C16	111.8 (5)
C13—N2—H2n	99.1	N3—C15—H15A	109.2
C14—N3—C15	108.2 (4)	C16—C15—H15A	109.2
C14—N3—Ni1vi	115.0 (4)	N3—C15—H15B	109.2
C15—N3—Ni1vi	115.5 (3)	C16—C15—H15B	109.2
C14—N3—H3n	105.7	H15A—C15—H15B	107.9
C15—N3—H3n	105.7	N2—C16—C15	111.5 (5)
Ni1vi—N3—H3n	105.7	N2—C16—H16A	109.3
O2—C1—O1	122.5 (4)	C15—C16—H16A	109.3
O2—C1—C2	121.2 (4)	N2—C16—H16B	109.3
O1—C1—C2	116.2 (4)	C15—C16—H16B	109.3
C3—C2—C4	119.6 (4)	H16A—C16—H16B	108.0
C3—C2—C1	115.7 (4)	O4—N4—O6	121.5 (9)
C4—C2—C1	124.6 (4)	O4—N4—O5	123.2 (10)
N1—C3—C2	125.4 (4)	O6—N4—O5	115.3 (10)
O1w—Ni1—O1—C1	−20.5 (5)	C4—C5—C6—C7	177.4 (5)
O1wi—Ni1—O1—C1	159.5 (5)	C5—C6—C7—F1	175.2 (5)
N3iii—Ni1—O1—C1	−107.8 (5)	C5—C6—C7—C8	−1.0 (9)
N3ii—Ni1—O1—C1	72.2 (5)	C16—N2—C8—C9	2.1 (8)
O3iv—Ni2—O2—C1	168.0 (5)	C13—N2—C8—C9	−144.4 (5)
O3—Ni2—O2—C1	−12.0 (5)	C16—N2—C8—C7	−174.0 (5)
O3wiv—Ni2—O2—C1	75.3 (6)	C13—N2—C8—C7	39.5 (8)
O3w—Ni2—O2—C1	−104.7 (6)	C6—C7—C8—N2	179.2 (5)
O2iv—Ni2—O3—C4	−170.1 (5)	F1—C7—C8—N2	3.0 (8)
O2—Ni2—O3—C4	9.9 (5)	C6—C7—C8—C9	2.9 (8)
O3wiv—Ni2—O3—C4	−78.3 (5)	F1—C7—C8—C9	−173.3 (5)
O3w—Ni2—O3—C4	101.7 (5)	N2—C8—C9—C10	−177.4 (5)
Ni2—O2—C1—O1	−172.1 (4)	C7—C8—C9—C10	−1.0 (8)
Ni2—O2—C1—C2	7.9 (8)	C8—C9—C10—N1	178.8 (5)
Ni1—O1—C1—O2	−6.5 (8)	C8—C9—C10—C5	−2.6 (8)
Ni1—O1—C1—C2	173.5 (3)	C3—N1—C10—C9	174.9 (5)
O2—C1—C2—C3	178.7 (5)	C11—N1—C10—C9	−1.6 (8)
O1—C1—C2—C3	−1.2 (7)	C3—N1—C10—C5	−3.7 (7)
O2—C1—C2—C4	2.5 (8)	C11—N1—C10—C5	179.7 (5)
O1—C1—C2—C4	−177.5 (5)	C6—C5—C10—C9	4.4 (7)
C10—N1—C3—C2	2.2 (8)	C4—C5—C10—C9	−175.7 (5)
C11—N1—C3—C2	178.9 (5)	C6—C5—C10—N1	−177.0 (5)
C4—C2—C3—N1	0.3 (9)	C4—C5—C10—N1	3.0 (7)
C1—C2—C3—N1	−176.1 (5)	C3—N1—C11—C12	−89.1 (6)
Ni2—O3—C4—C2	−4.4 (8)	C10—N1—C11—C12	87.5 (6)
Ni2—O3—C4—C5	176.5 (3)	C8—N2—C13—C14	92.7 (6)
C3—C2—C4—O3	179.8 (5)	C16—N2—C13—C14	−57.2 (6)
C1—C2—C4—O3	−4.1 (9)	C15—N3—C14—C13	−53.8 (5)
C3—C2—C4—C5	−1.0 (7)	Ni1vi—N3—C14—C13	175.4 (3)
C1—C2—C4—C5	175.1 (5)	N2—C13—C14—N3	56.8 (6)
O3—C4—C5—C6	−1.4 (8)	C14—N3—C15—C16	54.0 (6)
C2—C4—C5—C6	179.3 (5)	Ni1vi—N3—C15—C16	−175.4 (3)
O3—C4—C5—C10	178.6 (5)	C8—N2—C16—C15	−91.7 (6)
C2—C4—C5—C10	−0.7 (7)	C13—N2—C16—C15	58.7 (6)
C10—C5—C6—C7	−2.6 (8)	N3—C15—C16—N2	−58.6 (6)

D—H···A	D—H	H···A	D···A	D—H···A
O1w—H1w1···O4	0.85	2.16	2.820 (8)	135
O1w—H1w2···O2	0.85	1.97	2.700 (5)	143
O2w—H2w···O6vii	0.85	2.17	2.90 (1)	145
O3w—H3w1···O2w	0.85	2.09	2.699 (7)	128
O3w—H3w2···O5vii	0.85	1.96	2.77 (2)	161
N3—H3n···O2wviii	0.86	2.43	3.277 (6)	171

Table 1

Selected bond lengths (Å)

Ni1—O1	2.022 (3)
Ni1—O1w	2.103 (4)
Ni1—N3i	2.157 (5)
Ni2—O2	1.979 (4)
Ni2—O3	2.021 (3)
Ni2—O3w	2.108 (6)

Symmetry code: (i) .