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Acta Cryst. (2008). E64, m70    [ doi:10.1107/S1600536807062885 ]

Poly[[tetraaquabis[[mu]3-1-ethyl-6-fluoro-4-oxo-7-(piperazinium-1-yl)-1H-quinoline-3-carboxylato]dinickel(II)] hydroxide nitrate]

W.-D. Song, Y.-L. Wan, P.-Z. Hong and S. W. Ng

Abstract top

In the title compound, [Ni2(C16H18FN3O3)2(H2O)4](OH)(NO3), the cationic [Ni2(C16H18FN3O3)2(H2O)4]2+ building units are linked through Ni-Ocarboxylate and Ni-Namino bridges into a layer structure. The two independent nickel atoms lie on inversion centres: one adopts an NiO6 octahedral geometry, the other a trans-NiN2O4 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.

Comment top

The drug norfloxacin has been used in the synthesis of metal complexes as it is a carboxylic acid. There are many crystal structure reports of transition metal derivatives (Cambridge Structural Database Version 5.28, Nov. 2006) but all these have the compound in the mono-deprotonated form, in which the piperazinyl group is a neutral substitutent. In the title compound (I), the substituent is protonated (Fig. 1). There are two nickel ions in the asymmetric unit of (I), both with site symmety 1. One adopts an NiO6 geometry, the other a trans-NiN2O4 arrangement (Table 1). A network of O—H···O and N—H···O hydrogen bonds (Table 2) helps to establish the packing.

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

Related literature top

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

Experimental top

Nickel nitrate (1.0 mmol), 2,2'-bipyridine (1.0 mmol), norfloxacin (1 mmol) and water (10 ml) were hydrothermally treated in a Parr bomb at K22 K for 48 h. The bomb was cooled (5 K h-1) to room temperature to furnish blue blocks of (I).

Refinement top

The divalent cation in (I) requires two negative charges for charge balance. As the hydroxide [OH]- group lies near a special position, the occupancy of the O2w atom (arbitrarily labeled with a w) should be only half. Consequently, the nitrate [NO3]- group occupancy should also be half. Attempts to refine this group with full occupancy led to high displacement factors. The group was refined with a distance restraint of N–O 1.24±0.01 Å; the four atoms were restrained to lie on a plane. The Uij values of the four atoms as well as those of the O2w atom were restrained to be nearly isotropic.

The carbon- and nitrogen-bound H atoms were placed at calculated positions (C—H = 0.93–0.97 Å, N—H = 0.86 Å) and refined as riding with Uiso(H) = 1.2Ueq(carrier). The hydroxy and water H atoms were placed in chemically reasonable positions with O—H = 0.85Å and refined as riding with Uiso(H) = 1.5Ueq(O).

The final difference Fourier map had two large peaks in the vicinity of the diordered groups.

Computing details top

Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT (Bruker, 2004); 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, 2007).

Figures top
[Figure 1] Fig. 1. View of a fragment of the polymeric structure of (I). Displacement ellipsoids are drawn at the 30% probability level, and hydrogen atoms as sphere of arbitrary radius. Symmetry codes: (i) 1 - x, 1 - y, 1 - z; (ii) x, y, 1 + z; (iii) 1 - x, 1 - y, -z; (iv) 2 - x, 2 - y, 1 - z.
Poly[[tetraaquabis[µ3-1-ethyl-6-fluoro-4-oxo-7-(piperazinium-1-yl)- 1H-quinoline-3-carboxylato]dinickel(II)] hydroxide nitrate] top
Crystal data top
[Ni2(C16H18FN3O3)2(H2O)4](NO3)(OH)Z = 1
Mr = 907.17F(000) = 472
Triclinic, P1Dx = 1.575 Mg m−3
Hall symbol: -P 1Mo Kα radiation, λ = 0.71073 Å
a = 8.9633 (2) ÅCell parameters from 2076 reflections
b = 9.8121 (2) Åθ = 2.6–28.0°
c = 13.2119 (3) ŵ = 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
Data collection top
Bruker APEXII
diffractometer		4304 independent reflections
Radiation source: medium-focus sealed tube2869 reflections with I > 2σ(I)
graphiteRint = 0.051
φ and ω scansθmax = 27.5°, θmin = 2.6°
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		h = −11→11
Tmin = 0.686, Tmax = 0.856k = −12→12
11320 measured reflectionsl = −17→17
Refinement top
Refinement on F2Primary atom site location: structure-invariant direct methods
Least-squares matrix: fullSecondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.069Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.219H-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 parametersΔρmax = 1.65 e Å−3
34 restraintsΔρmin = −0.59 e Å−3
Crystal data top
[Ni2(C16H18FN3O3)2(H2O)4](NO3)(OH)γ = 113.528 (2)°
Mr = 907.17V = 956.34 (4) Å3
Triclinic, P1Z = 1
a = 8.9633 (2) ÅMo Kα radiation
b = 9.8121 (2) ŵ = 1.07 mm−1
c = 13.2119 (3) ÅT = 295 K
α = 101.504 (2)°0.18 × 0.16 × 0.15 mm
β = 106.301 (2)°
Data collection top
Bruker APEXII
diffractometer		2869 reflections with I > 2σ(I)
Absorption correction: multi-scan
(SADABS; Sheldrick, 1996)		Rint = 0.051
Tmin = 0.686, Tmax = 0.856θmax = 27.5°
11320 measured reflectionsStandard reflections: 0
4304 independent reflections
Refinement top
R[F2 > 2σ(F2)] = 0.069H-atom parameters constrained
wR(F2) = 0.219Δρmax = 1.65 e Å−3
S = 1.03Δρmin = −0.59 e Å−3
4304 reflectionsAbsolute structure: ?
280 parametersFlack parameter: ?
34 restraintsRogers parameter: ?
Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2) top
xyzUiso*/UeqOcc. (<1)
Ni10.50000.50000.50000.0328 (3)
Ni21.00001.00000.50000.0362 (3)
F10.8924 (5)1.1417 (4)0.0053 (3)0.0597 (10)
O10.5117 (4)0.6049 (4)0.3832 (3)0.0403 (9)
O20.7870 (5)0.8001 (5)0.4694 (3)0.0522 (11)
O30.9054 (5)0.9832 (5)0.3374 (3)0.0450 (10)
O1w0.7762 (5)0.5892 (5)0.5746 (3)0.0516 (10)
H1w10.81190.62310.64590.077*
H1w20.82800.66500.55370.077*
O2w1.4635 (5)0.9364 (5)0.4764 (3)0.079 (3)0.50
H2w1.41730.87420.40830.118*0.50
O3w1.1392 (8)0.8776 (7)0.4696 (5)0.0892 (17)
H3w11.22090.93260.45130.134*
H3w21.06780.78870.41630.134*
N10.4068 (5)0.6750 (5)0.0911 (3)0.0353 (9)
N20.5693 (6)0.9176 (6)−0.1764 (3)0.0445 (11)
H2n0.56241.0037−0.16160.053*
N30.5140 (6)0.7018 (5)−0.3881 (4)0.0399 (10)
H3n0.48860.7535−0.42940.048*
C10.6428 (6)0.7216 (6)0.3853 (4)0.0355 (11)
C20.6166 (6)0.7618 (6)0.2808 (4)0.0343 (11)
C30.4548 (7)0.6655 (6)0.1942 (4)0.0372 (11)
H30.37040.58650.20750.045*
C40.7510 (6)0.8857 (6)0.2651 (4)0.0330 (10)
C50.6994 (6)0.8949 (6)0.1519 (4)0.0324 (10)
C60.8197 (7)1.0130 (6)0.1263 (4)0.0378 (11)
H60.93071.08820.18240.045*
C70.7757 (7)1.0182 (6)0.0216 (4)0.0400 (12)
C80.6112 (7)0.9076 (6)−0.0698 (4)0.0367 (11)
C90.4899 (7)0.7932 (6)−0.0432 (4)0.0360 (11)
H90.37900.7186−0.09960.043*
C100.5301 (6)0.7878 (6)0.0651 (4)0.0328 (10)
C110.2248 (7)0.5575 (7)0.0058 (5)0.0445 (13)
H11A0.18460.6056−0.04570.053*
H11B0.14440.52870.04340.053*
C120.2190 (9)0.4110 (8)−0.0597 (6)0.0684 (19)
H12A0.09970.3378−0.11370.103*
H12B0.25690.3622−0.00910.103*
H12C0.29650.4389−0.09840.103*
C130.6999 (9)0.9619 (7)−0.2271 (5)0.0551 (16)
H13A0.81811.0297−0.16790.066*
H13B0.67581.0214−0.27390.066*
C140.6927 (7)0.8160 (7)−0.2977 (4)0.0481 (14)
H14A0.77760.8489−0.33190.058*
H14B0.72800.7627−0.24900.058*
C150.3826 (7)0.6632 (7)−0.3352 (4)0.0431 (12)
H15A0.40530.6045−0.28730.052*
H15B0.26380.5959−0.39380.052*
C160.3921 (8)0.8111 (8)−0.2659 (5)0.0489 (14)
H16A0.36230.8665−0.31470.059*
H16B0.30560.7812−0.23270.059*
O40.9439 (11)0.5634 (8)0.7796 (6)0.0490 (19)0.50
O51.0325 (17)0.4310 (17)0.6823 (12)0.126 (5)0.50
O60.8282 (11)0.3095 (10)0.7300 (8)0.063 (2)0.50
N40.9354 (9)0.4383 (9)0.7316 (5)0.046 (2)0.50
Atomic displacement parameters (Å2) top
U11U22U33U12U13U23
Ni10.0328 (5)0.0316 (5)0.0269 (5)0.0082 (4)0.0117 (4)0.0128 (4)
Ni20.0337 (5)0.0332 (5)0.0259 (5)0.0042 (4)0.0075 (4)0.0122 (4)
F10.074 (2)0.0439 (19)0.0362 (17)0.0039 (17)0.0227 (16)0.0180 (15)
O10.0361 (19)0.040 (2)0.0340 (18)0.0079 (16)0.0113 (15)0.0198 (16)
O20.044 (2)0.050 (2)0.0309 (19)−0.0013 (18)0.0047 (16)0.0212 (18)
O30.0351 (19)0.045 (2)0.0303 (18)0.0017 (17)0.0050 (15)0.0163 (17)
O1w0.041 (2)0.051 (2)0.053 (2)0.0136 (19)0.0144 (18)0.024 (2)
O2w0.069 (7)0.093 (9)0.067 (7)0.037 (7)0.024 (6)0.024 (7)
O3w0.084 (4)0.093 (4)0.094 (4)0.050 (3)0.034 (3)0.028 (3)
N10.029 (2)0.041 (2)0.029 (2)0.0115 (18)0.0106 (16)0.0132 (18)
N20.064 (3)0.041 (3)0.028 (2)0.024 (2)0.018 (2)0.015 (2)
N30.046 (3)0.035 (2)0.034 (2)0.013 (2)0.0175 (19)0.0142 (19)
C10.037 (3)0.037 (3)0.028 (2)0.013 (2)0.013 (2)0.014 (2)
C20.035 (3)0.035 (3)0.027 (2)0.012 (2)0.0110 (19)0.013 (2)
C30.037 (3)0.040 (3)0.037 (3)0.015 (2)0.019 (2)0.020 (2)
C40.036 (3)0.033 (3)0.029 (2)0.015 (2)0.013 (2)0.014 (2)
C50.035 (2)0.033 (3)0.027 (2)0.013 (2)0.0120 (19)0.013 (2)
C60.035 (3)0.035 (3)0.031 (2)0.009 (2)0.012 (2)0.009 (2)
C70.048 (3)0.033 (3)0.034 (3)0.012 (2)0.018 (2)0.015 (2)
C80.048 (3)0.039 (3)0.031 (2)0.025 (2)0.017 (2)0.017 (2)
C90.037 (3)0.035 (3)0.027 (2)0.014 (2)0.0076 (19)0.010 (2)
C100.036 (3)0.034 (3)0.029 (2)0.017 (2)0.0125 (19)0.012 (2)
C110.029 (3)0.056 (3)0.037 (3)0.014 (2)0.007 (2)0.017 (3)
C120.056 (4)0.046 (4)0.069 (5)0.011 (3)0.009 (3)0.004 (3)
C130.072 (4)0.039 (3)0.031 (3)0.006 (3)0.022 (3)0.012 (2)
C140.045 (3)0.044 (3)0.033 (3)0.002 (3)0.019 (2)0.007 (2)
C150.044 (3)0.047 (3)0.033 (3)0.020 (3)0.015 (2)0.009 (2)
C160.062 (4)0.067 (4)0.032 (3)0.043 (3)0.017 (3)0.021 (3)
O40.062 (5)0.030 (4)0.038 (4)0.019 (3)0.006 (3)0.005 (3)
O50.126 (8)0.116 (8)0.138 (8)0.022 (5)0.098 (7)0.060 (7)
O60.057 (5)0.046 (5)0.080 (6)0.016 (4)0.029 (4)0.026 (4)
N40.044 (5)0.058 (5)0.048 (5)0.026 (4)0.018 (4)0.037 (4)
Geometric parameters (Å, °) top
Ni1—O12.022 (3)C1—C21.492 (6)
Ni1—O1i2.022 (3)C2—C31.359 (7)
Ni1—O1w2.103 (4)C2—C41.430 (6)
Ni1—O1wi2.103 (4)C3—H30.9300
Ni1—N3ii2.157 (5)C4—C51.468 (6)
Ni1—N3iii2.157 (5)C5—C61.408 (6)
Ni2—O21.979 (4)C5—C101.411 (7)
Ni2—O2iv1.979 (4)C6—C71.345 (7)
Ni2—O3iv2.021 (3)C6—H60.9300
Ni2—O32.021 (3)C7—C81.418 (7)
Ni2—O3wiv2.108 (6)C8—C91.401 (7)
Ni2—O3w2.108 (6)C9—C101.390 (6)
F1—C71.352 (6)C9—H90.9300
O1—C11.260 (6)C11—C121.496 (10)
O2—C11.247 (6)C11—H11A0.9700
O3—C41.256 (6)C11—H11B0.9700
O1w—H1w10.8501C12—H12A0.9600
O1w—H1w20.8500C12—H12B0.9600
O2w—O2wv1.088 (8)C12—H12C0.9600
O2w—H2w0.8500C13—C141.511 (9)
O3w—H3w10.8501C13—H13A0.9700
O3w—H3w20.8501C13—H13B0.9700
N1—C31.343 (6)C14—H14A0.9700
N1—C101.398 (6)C14—H14B0.9700
N1—C111.486 (6)C15—C161.509 (8)
N2—C81.387 (6)C15—H15A0.9700
N2—C161.463 (7)C15—H15B0.9700
N2—C131.469 (7)C16—H16A0.9700
N2—H2n0.8600C16—H16B0.9700
N3—C141.485 (7)O4—N41.225 (8)
N3—C151.493 (7)O5—N41.241 (9)
N3—Ni1vi2.157 (5)O6—N41.237 (8)
N3—H3n0.8600
O1—Ni1—O1i180.000 (1)N1—C3—H3117.3
O1—Ni1—O1w94.08 (14)C2—C3—H3117.3
O1i—Ni1—O1w85.92 (14)O3—C4—C2126.4 (4)
O1—Ni1—O1wi85.92 (14)O3—C4—C5118.6 (4)
O1i—Ni1—O1wi94.08 (14)C2—C4—C5115.0 (4)
O1w—Ni1—O1wi180.0C6—C5—C10117.4 (4)
O1—Ni1—N3iii89.36 (15)C6—C5—C4120.4 (4)
O1i—Ni1—N3iii90.64 (15)C10—C5—C4122.2 (4)
O1w—Ni1—N3iii87.36 (16)C7—C6—C5120.7 (5)
O1wi—Ni1—N3iii92.64 (16)C7—C6—H6119.7
O1—Ni1—N3ii90.64 (15)C5—C6—H6119.7
O1i—Ni1—N3ii89.36 (15)C6—C7—F1117.3 (5)
O1w—Ni1—N3ii92.64 (16)C6—C7—C8123.8 (4)
O1wi—Ni1—N3ii87.36 (16)F1—C7—C8118.8 (4)
N3iii—Ni1—N3ii180.0 (2)N2—C8—C9122.3 (5)
O2iv—Ni2—O2180.0N2—C8—C7122.3 (4)
O2iv—Ni2—O3iv91.12 (14)C9—C8—C7115.3 (4)
O2—Ni2—O3iv88.88 (14)C10—C9—C8122.0 (5)
O2iv—Ni2—O388.88 (14)C10—C9—H9119.0
O2—Ni2—O391.12 (14)C8—C9—H9119.0
O3iv—Ni2—O3180.000 (1)C9—C10—N1121.5 (4)
O2iv—Ni2—O3wiv91.8 (2)C9—C10—C5120.7 (4)
O2—Ni2—O3wiv88.2 (2)N1—C10—C5117.8 (4)
O3iv—Ni2—O3wiv92.6 (2)N1—C11—C12111.7 (5)
O3—Ni2—O3wiv87.4 (2)N1—C11—H11A109.3
O2iv—Ni2—O3w88.2 (2)C12—C11—H11A109.3
O2—Ni2—O3w91.8 (2)N1—C11—H11B109.3
O3iv—Ni2—O3w87.4 (2)C12—C11—H11B109.3
O3—Ni2—O3w92.6 (2)H11A—C11—H11B107.9
O3wiv—Ni2—O3w180.000 (3)C11—C12—H12A109.5
C1—O1—Ni1128.4 (3)C11—C12—H12B109.5
C1—O2—Ni2130.1 (3)H12A—C12—H12B109.5
C4—O3—Ni2125.3 (3)C11—C12—H12C109.5
Ni1—O1w—H1w1109.5H12A—C12—H12C109.5
Ni1—O1w—H1w2109.5H12B—C12—H12C109.5
H1w1—O1w—H1w2109.5N2—C13—C14110.9 (4)
O2wv—O2w—H2w138.4N2—C13—H13A109.5
Ni2—O3w—H3w1109.5C14—C13—H13A109.5
Ni2—O3w—H3w2109.4N2—C13—H13B109.5
H3w1—O3w—H3w2109.5C14—C13—H13B109.5
C3—N1—C10119.8 (4)H13A—C13—H13B108.0
C3—N1—C11118.1 (4)N3—C14—C13113.3 (5)
C10—N1—C11122.0 (4)N3—C14—H14A108.9
C8—N2—C16120.9 (4)C13—C14—H14A108.9
C8—N2—C13122.5 (5)N3—C14—H14B108.9
C16—N2—C13109.1 (4)C13—C14—H14B108.9
C8—N2—H2n99.1H14A—C14—H14B107.7
C16—N2—H2n99.1N3—C15—C16111.8 (5)
C13—N2—H2n99.1N3—C15—H15A109.2
C14—N3—C15108.2 (4)C16—C15—H15A109.2
C14—N3—Ni1vi115.0 (4)N3—C15—H15B109.2
C15—N3—Ni1vi115.5 (3)C16—C15—H15B109.2
C14—N3—H3n105.7H15A—C15—H15B107.9
C15—N3—H3n105.7N2—C16—C15111.5 (5)
Ni1vi—N3—H3n105.7N2—C16—H16A109.3
O2—C1—O1122.5 (4)C15—C16—H16A109.3
O2—C1—C2121.2 (4)N2—C16—H16B109.3
O1—C1—C2116.2 (4)C15—C16—H16B109.3
C3—C2—C4119.6 (4)H16A—C16—H16B108.0
C3—C2—C1115.7 (4)O4—N4—O6121.5 (9)
C4—C2—C1124.6 (4)O4—N4—O5123.2 (10)
N1—C3—C2125.4 (4)O6—N4—O5115.3 (10)
O1w—Ni1—O1—C1−20.5 (5)C4—C5—C6—C7177.4 (5)
O1wi—Ni1—O1—C1159.5 (5)C5—C6—C7—F1175.2 (5)
N3iii—Ni1—O1—C1−107.8 (5)C5—C6—C7—C8−1.0 (9)
N3ii—Ni1—O1—C172.2 (5)C16—N2—C8—C92.1 (8)
O3iv—Ni2—O2—C1168.0 (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—C175.3 (6)C13—N2—C8—C739.5 (8)
O3w—Ni2—O2—C1−104.7 (6)C6—C7—C8—N2179.2 (5)
O2iv—Ni2—O3—C4−170.1 (5)F1—C7—C8—N23.0 (8)
O2—Ni2—O3—C49.9 (5)C6—C7—C8—C92.9 (8)
O3wiv—Ni2—O3—C4−78.3 (5)F1—C7—C8—C9−173.3 (5)
O3w—Ni2—O3—C4101.7 (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—C27.9 (8)C8—C9—C10—N1178.8 (5)
Ni1—O1—C1—O2−6.5 (8)C8—C9—C10—C5−2.6 (8)
Ni1—O1—C1—C2173.5 (3)C3—N1—C10—C9174.9 (5)
O2—C1—C2—C3178.7 (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—C42.5 (8)C11—N1—C10—C5179.7 (5)
O1—C1—C2—C4−177.5 (5)C6—C5—C10—C94.4 (7)
C10—N1—C3—C22.2 (8)C4—C5—C10—C9−175.7 (5)
C11—N1—C3—C2178.9 (5)C6—C5—C10—N1−177.0 (5)
C4—C2—C3—N10.3 (9)C4—C5—C10—N13.0 (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—C1287.5 (6)
Ni2—O3—C4—C5176.5 (3)C8—N2—C13—C1492.7 (6)
C3—C2—C4—O3179.8 (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—C13175.4 (3)
C1—C2—C4—C5175.1 (5)N2—C13—C14—N356.8 (6)
O3—C4—C5—C6−1.4 (8)C14—N3—C15—C1654.0 (6)
C2—C4—C5—C6179.3 (5)Ni1vi—N3—C15—C16−175.4 (3)
O3—C4—C5—C10178.6 (5)C8—N2—C16—C15−91.7 (6)
C2—C4—C5—C10−0.7 (7)C13—N2—C16—C1558.7 (6)
C10—C5—C6—C7−2.6 (8)N3—C15—C16—N2−58.6 (6)
Symmetry codes: (i) −x+1, −y+1, −z+1; (ii) x, y, z+1; (iii) −x+1, −y+1, −z; (iv) −x+2, −y+2, −z+1; (v) −x+3, −y+2, −z+1; (vi) x, y, z−1.
Hydrogen-bond geometry (Å, °) top
D—H···AD—HH···AD···AD—H···A
O1w—H1w1···O40.852.162.820 (8)135
O1w—H1w2···O20.851.972.700 (5)143
O2w—H2w···O6vii0.852.172.90 (1)145
O3w—H3w1···O2w0.852.092.699 (7)128
O3w—H3w2···O5vii0.851.962.77 (2)161
N3—H3n···O2wviii0.862.433.277 (6)171
Symmetry codes: (vii) −x+2, −y+1, −z+1; (viii) x−1, y, z−1.
Table 1
Selected geometric parameters (Å) top
Ni1—O12.022 (3)Ni2—O21.979 (4)
Ni1—O1w2.103 (4)Ni2—O32.021 (3)
Ni1—N3i2.157 (5)Ni2—O3w2.108 (6)
Symmetry codes: (i) x, y, z+1.
Acknowledgements top

We thank Guangdong Ocean University and the University of Malaya for supporting this study.

references
References top

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