metal-organic compounds
Bis[μ-4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole]bis{bis[4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole]nickel(II)} tetranitrate methanol disolvate
aSchool of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, People's Republic of China
*Correspondence e-mail: dougroup@163.com
The title complex, [Ni2(C4H8N4O2)6](NO3)4·2CH4O, contains a centrosymmetric binuclear nickel(II) complex bridged by a pair of 4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole ligands. The separation between the NiII atoms is 3.962 (1) Å. The Ni atoms are in a slightly distorted octahedral coordination. Intermolecular N—H⋯O, N—H⋯N and O—H⋯O hydrogen bonds connect the ligands, solvent molecules and nitrate ions.
Related literature
For the synthesis of the ligand see: Adamek (1960). For related literature, see: Feiters (1990); Vrevgdenhil et al. (1987).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Siemens, 1996); cell SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536807064148/kp2150sup1.cif
contains datablocks I, global. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536807064148/kp2150Isup2.hkl
NiCl2-6H2O, 4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole, and ammonia were reacted in 1:2:2 molar ratio in the mixed solution of CH3OH and H2O (in vol. ratio 2:1) under solvothermal condition at 423 K. After heating the solution for five days and cooling down to room temperature crystals were obtained.
All H atoms were placed geometrically and treated as riding on their parent atoms with C—H 0.96(pyridine), C—H 0.97 (methylene) Å [Uiso(H) = 1.2Ueq(C)],N—H 0.86 (amino)Å [Uiso(H) = 1.2Ueq(N)], and O—H 0.82 Å (hydroxyl) [Uiso(H) = 1.5Ueq(O)]
Bridging systems based on the 1,2,4,-triazole ring are interesting due to their similarity to 1,3-imidazolate found in superoxide dismutase (Feiters, 1990). So far some polynuclear nicker(II)co-ordination compounds have been descrided with the ligand H2ahmt [4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole], such as Ni4(NCS)4(Hahmt)4(H2O)4, Ni8(NCS)8(ahmt)(Hahmt)6(H2ahmt)4(H2O)12 (Vrevgdenhil et al., 1987). As an extension of this work on the structural characterization of 4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole derivatives, we have synthesized the title compound (I) and determined its
The binuclear complex has a centre of symmetry and two Ni atoms are surrounded by four H2ahmt ligands (Fig. 1, Table1). There are three distinctive coordination modes of H2ahmt to the metal: a) the ligand acts as a tridentate ligand through the hydroxymethyl O atom and a bridging µ-N(5) andµ-N(6) coordination mode between two Ni atoms, b) as a monodentate ligand, and c) as a bidentate ligand. The finite hydrogen-bonded assembly (Fig. 2, Table 2) displays hydrogen bonds N—H···O, O—H···O and O—H···N connecting complex cations, anions, and solvent molecules.For the synthesis of the ligand see: Adamek (1960) For related literature, see: Feiters (1990); Vrevgdenhil et al. (1987).
Data collection: SMART (Siemens, 1996); cell
SAINT (Siemens, 1996); data reduction: SAINT (Siemens, 1996); program(s) used to solve structure: SHELXS97 (Sheldrick, 1997a); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997a); molecular graphics: SHELXTL (Sheldrick, 1997b); software used to prepare material for publication: SHELXTL (Sheldrick, 1997b).Fig. 1. The molecular structure of the title complex. Displacement ellipsoids are drawn at the 30% probability level and H atoms have been omitted for clarity. | |
Fig. 2. Crystal packing with hydrogen bonds shown as dashed lines. |
[Ni2(C4H8N4O2)6](NO3)4·2CH4O | F(000) = 1344 |
Mr = 1294.41 | Dx = 1.603 Mg m−3 |
Monoclinic, P21/n | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -P 2yn | Cell parameters from 2129 reflections |
a = 12.5126 (17) Å | θ = 2.5–25.2° |
b = 13.2808 (18) Å | µ = 0.81 mm−1 |
c = 16.153 (2) Å | T = 298 K |
β = 92.699 (2)° | Block, green |
V = 2681.3 (7) Å3 | 0.21 × 0.18 × 0.13 mm |
Z = 2 |
Bruker SMART CCD diffractometer | 4719 independent reflections |
Radiation source: fine-focus sealed tube | 2751 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.063 |
φ and ω scans | θmax = 25.0°, θmin = 2.0° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −13→14 |
Tmin = 0.848, Tmax = 0.902 | k = −15→15 |
12772 measured reflections | l = −14→19 |
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)] = 0.065 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.188 | H-atom parameters constrained |
S = 0.91 | w = 1/[σ2(Fo2) + (0.1128P)2] where P = (Fo2 + 2Fc2)/3 |
4719 reflections | (Δ/σ)max = 0.001 |
366 parameters | Δρmax = 1.19 e Å−3 |
0 restraints | Δρmin = −1.04 e Å−3 |
[Ni2(C4H8N4O2)6](NO3)4·2CH4O | V = 2681.3 (7) Å3 |
Mr = 1294.41 | Z = 2 |
Monoclinic, P21/n | Mo Kα radiation |
a = 12.5126 (17) Å | µ = 0.81 mm−1 |
b = 13.2808 (18) Å | T = 298 K |
c = 16.153 (2) Å | 0.21 × 0.18 × 0.13 mm |
β = 92.699 (2)° |
Bruker SMART CCD diffractometer | 4719 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2751 reflections with I > 2σ(I) |
Tmin = 0.848, Tmax = 0.902 | Rint = 0.063 |
12772 measured reflections |
R[F2 > 2σ(F2)] = 0.065 | 0 restraints |
wR(F2) = 0.188 | H-atom parameters constrained |
S = 0.91 | Δρmax = 1.19 e Å−3 |
4719 reflections | Δρmin = −1.04 e Å−3 |
366 parameters |
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 | 0.90189 (5) | 0.09542 (5) | 0.94051 (4) | 0.0325 (2) | |
N1 | 1.0196 (3) | 0.1751 (3) | 0.8847 (3) | 0.0367 (11) | |
N2 | 1.1256 (4) | 0.1555 (3) | 0.9116 (3) | 0.0395 (11) | |
N3 | 1.1235 (4) | 0.2706 (4) | 0.8165 (3) | 0.0435 (12) | |
N4 | 1.1555 (4) | 0.3392 (5) | 0.7575 (4) | 0.0728 (19) | |
H4A | 1.1085 | 0.3677 | 0.7247 | 0.087* | |
H4B | 1.2222 | 0.3531 | 0.7538 | 0.087* | |
N5 | 0.9656 (3) | −0.0413 (3) | 0.9065 (3) | 0.0337 (10) | |
N6 | 1.0247 (4) | −0.1188 (3) | 0.9433 (3) | 0.0358 (11) | |
N7 | 0.9660 (4) | −0.1658 (3) | 0.8205 (3) | 0.0421 (12) | |
N8 | 0.9454 (5) | −0.2235 (4) | 0.7493 (3) | 0.0707 (18) | |
H8A | 0.9070 | −0.1991 | 0.7085 | 0.085* | |
H8B | 0.9711 | −0.2833 | 0.7462 | 0.085* | |
N9 | 0.7838 (4) | 0.1977 (3) | 0.9584 (3) | 0.0390 (11) | |
N10 | 0.7583 (4) | 0.2951 (3) | 0.9320 (3) | 0.0411 (12) | |
N11 | 0.6360 (4) | 0.2398 (4) | 1.0129 (3) | 0.0426 (12) | |
N12 | 0.5476 (4) | 0.2333 (4) | 1.0626 (3) | 0.0584 (16) | |
H12A | 0.5379 | 0.1800 | 1.0916 | 0.070* | |
H12B | 0.5030 | 0.2824 | 1.0641 | 0.070* | |
N13 | 0.3441 (8) | 0.5295 (7) | 0.7903 (6) | 0.1035 (16) | |
N14 | 0.7629 (7) | 0.1956 (8) | 0.6076 (6) | 0.098 (3) | |
O1 | 0.8962 (4) | 0.3815 (3) | 0.8150 (3) | 0.0641 (13) | |
H1 | 0.8593 | 0.3713 | 0.8547 | 0.096* | |
O2 | 1.3471 (4) | 0.1683 (4) | 0.9440 (3) | 0.0683 (14) | |
H2 | 1.2991 | 0.1490 | 0.9730 | 0.103* | |
O3 | 0.8214 (3) | 0.0701 (3) | 0.8228 (2) | 0.0417 (10) | |
H3 | 0.7570 | 0.0621 | 0.8274 | 0.062* | |
O4 | 1.1786 (4) | −0.2835 (4) | 0.8582 (3) | 0.0828 (17) | |
H4 | 1.1977 | −0.3393 | 0.8430 | 0.124* | |
O5 | 0.7851 (3) | 0.0094 (3) | 0.9998 (2) | 0.0406 (9) | |
H5 | 0.8048 | −0.0402 | 1.0267 | 0.061* | |
O6 | 0.5163 (5) | 0.3947 (4) | 0.9096 (4) | 0.1035 (16) | |
H6 | 0.5003 | 0.4432 | 0.8801 | 0.155* | |
O7 | 0.4045 (6) | 0.5941 (5) | 0.8164 (5) | 0.125 (3) | |
O8 | 0.3724 (5) | 0.4514 (5) | 0.7620 (5) | 0.115 (3) | |
O9 | 0.2502 (7) | 0.5485 (6) | 0.7845 (6) | 0.159 (4) | |
O10 | 0.7076 (6) | 0.1478 (7) | 0.6485 (5) | 0.144 (3) | |
O11 | 0.8346 (7) | 0.1599 (6) | 0.5698 (6) | 0.157 (4) | |
O12 | 0.7564 (6) | 0.2863 (8) | 0.6035 (5) | 0.134 (3) | |
O13 | 0.6140 (4) | 0.0487 (4) | 0.7942 (4) | 0.0797 (16) | |
H13 | 0.6044 | 0.0139 | 0.7526 | 0.120* | |
C1 | 0.9259 (5) | 0.2882 (5) | 0.7800 (4) | 0.0494 (16) | |
H1A | 0.9426 | 0.2981 | 0.7226 | 0.059* | |
H1B | 0.8663 | 0.2415 | 0.7813 | 0.059* | |
C2 | 1.0214 (5) | 0.2441 (4) | 0.8270 (4) | 0.0400 (14) | |
C3 | 1.1843 (4) | 0.2153 (4) | 0.8701 (4) | 0.0389 (13) | |
C4 | 1.3038 (5) | 0.2228 (5) | 0.8783 (4) | 0.0545 (17) | |
H4C | 1.3336 | 0.1988 | 0.8276 | 0.065* | |
H4D | 1.3238 | 0.2929 | 0.8853 | 0.065* | |
C5 | 0.8627 (5) | −0.0106 (5) | 0.7768 (4) | 0.0461 (15) | |
H5A | 0.9039 | 0.0151 | 0.7320 | 0.055* | |
H5B | 0.8046 | −0.0513 | 0.7530 | 0.055* | |
C6 | 0.9310 (5) | −0.0715 (4) | 0.8334 (3) | 0.0372 (13) | |
C7 | 1.0245 (5) | −0.1936 (4) | 0.8897 (4) | 0.0407 (14) | |
C8 | 1.0773 (6) | −0.2919 (4) | 0.8967 (4) | 0.0530 (17) | |
H8C | 1.0883 | −0.3106 | 0.9545 | 0.064* | |
H8D | 1.0334 | −0.3431 | 0.8690 | 0.064* | |
C9 | 0.7120 (5) | 0.0662 (4) | 1.0460 (4) | 0.0446 (15) | |
H9A | 0.7365 | 0.0708 | 1.1037 | 0.054* | |
H9B | 0.6415 | 0.0356 | 1.0427 | 0.054* | |
C10 | 0.7096 (4) | 0.1669 (4) | 1.0066 (3) | 0.0367 (13) | |
C11 | 0.6685 (5) | 0.3183 (4) | 0.9657 (4) | 0.0410 (14) | |
C12 | 0.6129 (6) | 0.4159 (5) | 0.9566 (5) | 0.063 (2) | |
H12C | 0.5976 | 0.4433 | 1.0104 | 0.076* | |
H12D | 0.6562 | 0.4638 | 0.9277 | 0.076* | |
C13 | 0.5390 (7) | 0.0235 (7) | 0.8515 (6) | 0.093 (3) | |
H13A | 0.5649 | −0.0324 | 0.8843 | 0.140* | |
H13B | 0.4728 | 0.0054 | 0.8228 | 0.140* | |
H13C | 0.5275 | 0.0801 | 0.8869 | 0.140* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ni1 | 0.0297 (4) | 0.0320 (4) | 0.0364 (4) | 0.0031 (3) | 0.0070 (3) | 0.0008 (3) |
N1 | 0.030 (3) | 0.037 (3) | 0.044 (3) | 0.002 (2) | 0.008 (2) | 0.005 (2) |
N2 | 0.031 (3) | 0.042 (3) | 0.046 (3) | 0.002 (2) | 0.008 (2) | 0.008 (2) |
N3 | 0.039 (3) | 0.045 (3) | 0.047 (3) | −0.006 (2) | 0.008 (2) | 0.012 (2) |
N4 | 0.044 (3) | 0.089 (5) | 0.086 (4) | −0.015 (3) | 0.001 (3) | 0.052 (4) |
N5 | 0.031 (3) | 0.034 (2) | 0.037 (3) | 0.004 (2) | 0.005 (2) | 0.000 (2) |
N6 | 0.038 (3) | 0.029 (2) | 0.042 (3) | 0.007 (2) | 0.012 (2) | −0.002 (2) |
N7 | 0.049 (3) | 0.039 (3) | 0.039 (3) | 0.000 (2) | 0.003 (2) | −0.009 (2) |
N8 | 0.104 (5) | 0.057 (4) | 0.049 (4) | 0.009 (4) | −0.016 (3) | −0.020 (3) |
N9 | 0.037 (3) | 0.037 (3) | 0.043 (3) | 0.009 (2) | 0.008 (2) | 0.003 (2) |
N10 | 0.041 (3) | 0.037 (3) | 0.046 (3) | 0.010 (2) | 0.007 (2) | 0.002 (2) |
N11 | 0.037 (3) | 0.045 (3) | 0.046 (3) | 0.009 (2) | 0.007 (2) | −0.003 (2) |
N12 | 0.042 (3) | 0.066 (4) | 0.070 (4) | 0.022 (3) | 0.030 (3) | 0.018 (3) |
N13 | 0.081 (4) | 0.088 (3) | 0.141 (5) | 0.008 (3) | −0.005 (3) | −0.001 (3) |
N14 | 0.071 (6) | 0.107 (7) | 0.117 (7) | 0.008 (6) | 0.013 (5) | 0.029 (6) |
O1 | 0.067 (3) | 0.056 (3) | 0.071 (3) | 0.015 (2) | 0.021 (3) | 0.020 (2) |
O2 | 0.042 (3) | 0.073 (3) | 0.089 (4) | −0.009 (2) | 0.002 (3) | 0.023 (3) |
O3 | 0.037 (2) | 0.042 (2) | 0.046 (2) | 0.0036 (18) | 0.0040 (19) | 0.0000 (18) |
O4 | 0.088 (4) | 0.062 (3) | 0.100 (4) | 0.029 (3) | 0.026 (3) | −0.010 (3) |
O5 | 0.040 (2) | 0.035 (2) | 0.049 (2) | 0.0061 (18) | 0.0154 (18) | −0.0010 (17) |
O6 | 0.081 (4) | 0.088 (3) | 0.141 (5) | 0.008 (3) | −0.005 (3) | −0.001 (3) |
O7 | 0.115 (6) | 0.117 (5) | 0.145 (6) | −0.035 (5) | 0.044 (5) | −0.058 (5) |
O8 | 0.085 (4) | 0.067 (4) | 0.198 (7) | −0.004 (3) | 0.057 (5) | −0.030 (4) |
O9 | 0.106 (6) | 0.126 (6) | 0.242 (10) | 0.038 (5) | −0.014 (6) | −0.079 (6) |
O10 | 0.108 (6) | 0.181 (8) | 0.147 (7) | −0.009 (6) | 0.051 (5) | 0.045 (6) |
O11 | 0.118 (6) | 0.113 (6) | 0.248 (10) | −0.012 (5) | 0.098 (7) | −0.013 (6) |
O12 | 0.115 (6) | 0.147 (7) | 0.142 (7) | 0.037 (6) | 0.014 (5) | 0.024 (6) |
O13 | 0.061 (3) | 0.083 (4) | 0.097 (4) | −0.012 (3) | 0.023 (3) | −0.016 (3) |
C1 | 0.048 (4) | 0.050 (4) | 0.050 (4) | 0.004 (3) | 0.006 (3) | 0.012 (3) |
C2 | 0.040 (4) | 0.038 (3) | 0.042 (3) | −0.004 (3) | 0.004 (3) | 0.004 (3) |
C3 | 0.032 (3) | 0.042 (3) | 0.044 (3) | −0.005 (3) | 0.009 (3) | 0.005 (3) |
C4 | 0.042 (4) | 0.057 (4) | 0.065 (5) | −0.013 (3) | 0.002 (3) | 0.013 (3) |
C5 | 0.046 (4) | 0.053 (4) | 0.039 (3) | 0.012 (3) | 0.002 (3) | −0.007 (3) |
C6 | 0.038 (3) | 0.039 (3) | 0.035 (3) | 0.003 (3) | 0.004 (3) | −0.002 (2) |
C7 | 0.043 (4) | 0.037 (3) | 0.042 (4) | 0.003 (3) | 0.009 (3) | −0.003 (3) |
C8 | 0.067 (5) | 0.037 (3) | 0.054 (4) | 0.005 (3) | −0.003 (3) | 0.000 (3) |
C9 | 0.041 (4) | 0.045 (3) | 0.049 (4) | 0.007 (3) | 0.016 (3) | 0.002 (3) |
C10 | 0.029 (3) | 0.038 (3) | 0.043 (3) | 0.004 (3) | 0.006 (3) | −0.001 (3) |
C11 | 0.038 (3) | 0.042 (3) | 0.043 (3) | 0.007 (3) | 0.004 (3) | 0.001 (3) |
C12 | 0.066 (5) | 0.052 (4) | 0.074 (5) | 0.027 (4) | 0.012 (4) | 0.007 (4) |
C13 | 0.082 (6) | 0.102 (7) | 0.100 (7) | −0.041 (5) | 0.035 (5) | −0.024 (5) |
Ni1—N9 | 2.037 (4) | N14—O12 | 1.209 (10) |
Ni1—N1 | 2.055 (4) | O1—C1 | 1.419 (7) |
Ni1—N5 | 2.068 (4) | O1—H1 | 0.8200 |
Ni1—N6i | 2.073 (5) | O2—C4 | 1.374 (7) |
Ni1—O5 | 2.119 (4) | O2—H2 | 0.8200 |
Ni1—O3 | 2.136 (4) | O3—C5 | 1.415 (6) |
N1—C2 | 1.308 (7) | O3—H3 | 0.8200 |
N1—N2 | 1.402 (6) | O4—C8 | 1.443 (8) |
N2—C3 | 1.291 (7) | O4—H4 | 0.8200 |
N3—C2 | 1.343 (7) | O5—C9 | 1.424 (6) |
N3—C3 | 1.344 (7) | O5—H5 | 0.8200 |
N3—N4 | 1.392 (6) | O6—C12 | 1.424 (9) |
N4—H4A | 0.8600 | O6—H6 | 0.8200 |
N4—H4B | 0.8600 | O13—C13 | 1.389 (8) |
N5—C6 | 1.302 (7) | O13—H13 | 0.8200 |
N5—N6 | 1.385 (6) | C1—C2 | 1.505 (8) |
N6—C7 | 1.318 (7) | C1—H1A | 0.9700 |
N6—Ni1i | 2.073 (5) | C1—H1B | 0.9700 |
N7—C6 | 1.347 (7) | C3—C4 | 1.498 (8) |
N7—C7 | 1.359 (7) | C4—H4C | 0.9700 |
N7—N8 | 1.395 (6) | C4—H4D | 0.9700 |
N8—H8A | 0.8600 | C5—C6 | 1.465 (8) |
N8—H8B | 0.8600 | C5—H5A | 0.9700 |
N9—C10 | 1.305 (7) | C5—H5B | 0.9700 |
N9—N10 | 1.395 (6) | C7—C8 | 1.465 (8) |
N10—C11 | 1.308 (7) | C8—H8C | 0.9700 |
N11—C10 | 1.343 (7) | C8—H8D | 0.9700 |
N11—C11 | 1.363 (7) | C9—C10 | 1.481 (8) |
N11—N12 | 1.400 (6) | C9—H9A | 0.9700 |
N12—H12A | 0.8600 | C9—H9B | 0.9700 |
N12—H12B | 0.8600 | C11—C12 | 1.475 (8) |
N13—O8 | 1.194 (9) | C12—H12C | 0.9700 |
N13—O9 | 1.202 (10) | C12—H12D | 0.9700 |
N13—O7 | 1.207 (10) | C13—H13A | 0.9600 |
N14—O10 | 1.167 (9) | C13—H13B | 0.9600 |
N14—O11 | 1.205 (10) | C13—H13C | 0.9600 |
N9—Ni1—N1 | 104.95 (18) | C12—O6—H6 | 109.5 |
N9—Ni1—N5 | 156.10 (19) | C13—O13—H13 | 109.5 |
N1—Ni1—N5 | 92.46 (17) | O1—C1—C2 | 110.8 (5) |
N9—Ni1—N6i | 93.72 (17) | O1—C1—H1A | 109.5 |
N1—Ni1—N6i | 91.35 (18) | C2—C1—H1A | 109.5 |
N5—Ni1—N6i | 102.25 (17) | O1—C1—H1B | 109.5 |
N9—Ni1—O5 | 77.02 (17) | C2—C1—H1B | 109.5 |
N1—Ni1—O5 | 177.81 (17) | H1A—C1—H1B | 108.1 |
N5—Ni1—O5 | 85.92 (15) | N1—C2—N3 | 108.8 (5) |
N6i—Ni1—O5 | 87.57 (16) | N1—C2—C1 | 126.3 (5) |
N9—Ni1—O3 | 85.24 (16) | N3—C2—C1 | 124.9 (5) |
N1—Ni1—O3 | 90.46 (16) | N2—C3—N3 | 110.7 (5) |
N5—Ni1—O3 | 78.26 (16) | N2—C3—C4 | 125.8 (5) |
N6i—Ni1—O3 | 178.09 (16) | N3—C3—C4 | 123.6 (5) |
O5—Ni1—O3 | 90.64 (15) | O2—C4—C3 | 112.9 (5) |
C2—N1—N2 | 107.6 (4) | O2—C4—H4C | 109.0 |
C2—N1—Ni1 | 135.3 (4) | C3—C4—H4C | 109.0 |
N2—N1—Ni1 | 117.1 (3) | O2—C4—H4D | 109.0 |
C3—N2—N1 | 106.1 (4) | C3—C4—H4D | 109.0 |
C2—N3—C3 | 106.8 (5) | H4C—C4—H4D | 107.8 |
C2—N3—N4 | 124.3 (5) | O3—C5—C6 | 107.9 (5) |
C3—N3—N4 | 128.8 (5) | O3—C5—H5A | 110.1 |
N3—N4—H4A | 120.0 | C6—C5—H5A | 110.1 |
N3—N4—H4B | 120.0 | O3—C5—H5B | 110.1 |
H4A—N4—H4B | 120.0 | C6—C5—H5B | 110.1 |
C6—N5—N6 | 108.0 (4) | H5A—C5—H5B | 108.4 |
C6—N5—Ni1 | 113.3 (4) | N5—C6—N7 | 109.3 (5) |
N6—N5—Ni1 | 138.0 (3) | N5—C6—C5 | 123.8 (5) |
C7—N6—N5 | 107.1 (5) | N7—C6—C5 | 127.0 (5) |
C7—N6—Ni1i | 134.0 (4) | N6—C7—N7 | 108.7 (5) |
N5—N6—Ni1i | 118.9 (3) | N6—C7—C8 | 129.4 (6) |
C6—N7—C7 | 107.0 (5) | N7—C7—C8 | 121.9 (5) |
C6—N7—N8 | 126.1 (5) | O4—C8—C7 | 107.5 (5) |
C7—N7—N8 | 126.9 (5) | O4—C8—H8C | 110.2 |
N7—N8—H8A | 120.0 | C7—C8—H8C | 110.2 |
N7—N8—H8B | 120.0 | O4—C8—H8D | 110.2 |
H8A—N8—H8B | 120.0 | C7—C8—H8D | 110.2 |
C10—N9—N10 | 108.3 (4) | H8C—C8—H8D | 108.5 |
C10—N9—Ni1 | 114.6 (4) | O5—C9—C10 | 104.7 (4) |
N10—N9—Ni1 | 137.1 (4) | O5—C9—H9A | 110.8 |
C11—N10—N9 | 106.2 (5) | C10—C9—H9A | 110.8 |
C10—N11—C11 | 106.6 (5) | O5—C9—H9B | 110.8 |
C10—N11—N12 | 124.1 (5) | C10—C9—H9B | 110.8 |
C11—N11—N12 | 129.2 (5) | H9A—C9—H9B | 108.9 |
N11—N12—H12A | 120.0 | N9—C10—N11 | 109.2 (5) |
N11—N12—H12B | 120.0 | N9—C10—C9 | 122.6 (5) |
H12A—N12—H12B | 120.0 | N11—C10—C9 | 128.3 (5) |
O8—N13—O9 | 117.3 (10) | N10—C11—N11 | 109.7 (5) |
O8—N13—O7 | 124.0 (10) | N10—C11—C12 | 125.1 (6) |
O9—N13—O7 | 118.2 (10) | N11—C11—C12 | 125.1 (5) |
O10—N14—O11 | 123.3 (11) | O6—C12—C11 | 105.4 (6) |
O10—N14—O12 | 122.2 (11) | O6—C12—H12C | 110.7 |
O11—N14—O12 | 114.5 (10) | C11—C12—H12C | 110.7 |
C1—O1—H1 | 109.5 | O6—C12—H12D | 110.7 |
C4—O2—H2 | 109.5 | C11—C12—H12D | 110.7 |
C5—O3—Ni1 | 114.7 (3) | H12C—C12—H12D | 108.8 |
C5—O3—H3 | 109.5 | O13—C13—H13A | 109.5 |
Ni1—O3—H3 | 111.3 | O13—C13—H13B | 109.5 |
C8—O4—H4 | 109.5 | H13A—C13—H13B | 109.5 |
C9—O5—Ni1 | 115.1 (3) | O13—C13—H13C | 109.5 |
C9—O5—H5 | 109.4 | H13A—C13—H13C | 109.5 |
Ni1—O5—H5 | 118.4 | H13B—C13—H13C | 109.5 |
Symmetry code: (i) −x+2, −y, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4B···O8ii | 0.86 | 2.29 | 3.094 (8) | 156 |
N8—H8A···O6iii | 0.86 | 2.51 | 3.066 (9) | 123 |
N8—H8B···O13iii | 0.86 | 2.54 | 3.186 (8) | 132 |
N12—H12B···O11iv | 0.86 | 2.25 | 3.027 (9) | 151 |
O2—H2···O12v | 0.82 | 2.36 | 2.926 (10) | 127 |
O2—H2···O5i | 0.82 | 2.40 | 3.045 (6) | 136 |
O4—H4···O9vi | 0.82 | 1.90 | 2.702 (9) | 166 |
O5—H5···N2i | 0.82 | 2.00 | 2.817 (6) | 172 |
O13—H13···O1iii | 0.82 | 2.07 | 2.834 (7) | 155 |
Symmetry codes: (i) −x+2, −y, −z+2; (ii) x+1, y, z; (iii) −x+3/2, y−1/2, −z+3/2; (iv) x−1/2, −y+1/2, z+1/2; (v) x+1/2, −y+1/2, z+1/2; (vi) x+1, y−1, z. |
Experimental details
Crystal data | |
Chemical formula | [Ni2(C4H8N4O2)6](NO3)4·2CH4O |
Mr | 1294.41 |
Crystal system, space group | Monoclinic, P21/n |
Temperature (K) | 298 |
a, b, c (Å) | 12.5126 (17), 13.2808 (18), 16.153 (2) |
β (°) | 92.699 (2) |
V (Å3) | 2681.3 (7) |
Z | 2 |
Radiation type | Mo Kα |
µ (mm−1) | 0.81 |
Crystal size (mm) | 0.21 × 0.18 × 0.13 |
Data collection | |
Diffractometer | Bruker SMART CCD |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.848, 0.902 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 12772, 4719, 2751 |
Rint | 0.063 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.065, 0.188, 0.91 |
No. of reflections | 4719 |
No. of parameters | 366 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 1.19, −1.04 |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SHELXS97 (Sheldrick, 1997a), SHELXL97 (Sheldrick, 1997a), SHELXTL (Sheldrick, 1997b).
Ni1—N9 | 2.037 (4) | Ni1—O5 | 2.119 (4) |
Ni1—N1 | 2.055 (4) | Ni1—O3 | 2.136 (4) |
Ni1—N5 | 2.068 (4) | N6—Ni1i | 2.073 (5) |
Ni1—N6i | 2.073 (5) | ||
N9—Ni1—N1 | 104.95 (18) | N5—Ni1—O5 | 85.92 (15) |
N9—Ni1—N5 | 156.10 (19) | N6i—Ni1—O5 | 87.57 (16) |
N1—Ni1—N5 | 92.46 (17) | N9—Ni1—O3 | 85.24 (16) |
N9—Ni1—N6i | 93.72 (17) | N1—Ni1—O3 | 90.46 (16) |
N1—Ni1—N6i | 91.35 (18) | N5—Ni1—O3 | 78.26 (16) |
N5—Ni1—N6i | 102.25 (17) | N6i—Ni1—O3 | 178.09 (16) |
N9—Ni1—O5 | 77.02 (17) | O5—Ni1—O3 | 90.64 (15) |
N1—Ni1—O5 | 177.81 (17) |
Symmetry code: (i) −x+2, −y, −z+2. |
D—H···A | D—H | H···A | D···A | D—H···A |
N4—H4B···O8ii | 0.86 | 2.29 | 3.094 (8) | 156.4 |
N8—H8A···O6iii | 0.86 | 2.51 | 3.066 (9) | 123.4 |
N8—H8B···O13iii | 0.86 | 2.54 | 3.186 (8) | 132.3 |
N12—H12B···O11iv | 0.86 | 2.25 | 3.027 (9) | 150.5 |
O2—H2···O12v | 0.82 | 2.36 | 2.926 (10) | 126.8 |
O2—H2···O5i | 0.82 | 2.40 | 3.045 (6) | 135.9 |
O4—H4···O9vi | 0.82 | 1.90 | 2.702 (9) | 166.3 |
O5—H5···N2i | 0.82 | 2.00 | 2.817 (6) | 171.7 |
O13—H13···O1iii | 0.82 | 2.07 | 2.834 (7) | 155.3 |
Symmetry codes: (i) −x+2, −y, −z+2; (ii) x+1, y, z; (iii) −x+3/2, y−1/2, −z+3/2; (iv) x−1/2, −y+1/2, z+1/2; (v) x+1/2, −y+1/2, z+1/2; (vi) x+1, y−1, z. |
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Project No. 20371025).
References
Adamek, M. (1960). Collect. Czech Chem. Commun. 25, 1694–1697. CAS Google Scholar
Feiters, M. C. (1990). Comments Inorg. Chem. 11, 131–174. CrossRef CAS Google Scholar
Sheldrick, G. M. (1996). SADABS. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (1997a). SHELXL97 and SHELXS97. University of Göttingen, Germany. Google Scholar
Sheldrick, G. M. (1997b). SHELXTL. Version 5.1. Bruker AXS Inc., Madison, Wisconsin, USA. Google Scholar
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Bridging systems based on the 1,2,4,-triazole ring are interesting due to their similarity to 1,3-imidazolate found in superoxide dismutase (Feiters, 1990). So far some polynuclear nicker(II)co-ordination compounds have been descrided with the ligand H2ahmt [4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole], such as Ni4(NCS)4(Hahmt)4(H2O)4, Ni8(NCS)8(ahmt)(Hahmt)6(H2ahmt)4(H2O)12 (Vrevgdenhil et al., 1987). As an extension of this work on the structural characterization of 4-amino-3,5-bis(hydroxymethyl)-1,2,4-triazole derivatives, we have synthesized the title compound (I) and determined its crystal structure. The binuclear complex has a centre of symmetry and two Ni atoms are surrounded by four H2ahmt ligands (Fig. 1, Table1). There are three distinctive coordination modes of H2ahmt to the metal: a) the ligand acts as a tridentate ligand through the hydroxymethyl O atom and a bridging µ-N(5) andµ-N(6) coordination mode between two Ni atoms, b) as a monodentate ligand, and c) as a bidentate ligand. The finite hydrogen-bonded assembly (Fig. 2, Table 2) displays hydrogen bonds N—H···O, O—H···O and O—H···N connecting complex cations, anions, and solvent molecules.