Supporting information
Crystallographic Information File (CIF) https://doi.org/10.1107/S1600536807033582/hy2070sup1.cif | |
Structure factor file (CIF format) https://doi.org/10.1107/S1600536807033582/hy2070Isup2.hkl |
CCDC reference: 648656
A solution of Ni(CH3CO2)2.H2O (0.100 g, 0.4 mmol) in methanol (10 ml) was added to the mixture of 1,2-disalicyloylhydrazine (0.054 g, 0.2 mmol) and sodium hydroxide (0.032 g, 0.8 mmol) in pyridine (10 ml). A red solution was generated after stirring for 2 h at room temperature. The solution was allowed to stand for 2 weeks, whereupon red needle crystals were obtained (0.070 g, yield 34%).
All H atoms were positioned geometrically and refined as riding atoms, with C—H = 0.93Å and Uiso(H) = 1.2Ueq(C).
Recently, we have synthesized two metallacrowns using N-acyl-3-hydroxy-2-naphthalenecarbohydrazide (Dou et al., 2006). As an extension of our work on the structural characterization of naphthalenecarbohydrazide compounds, the title complex, (I), was synthesized and characterized by X-ray diffraction.
The complex (I) (space group I41/a) is a polymorph of the compound (space group P21/c) previously reported by Chen & Liu (2005), with the same formula [Ni2(C14H8N2O4)(C5H5N)6].2C5H5N. The complex molecule of (I) lies on an inversion center (Fig. 1). The 1,2-disalicyloylhydrazine molecule acts as a hexadentate tetravalent anionic ligand linking two NiII atoms. The iminophenolate group (O2 and N1) and the iminoacyl group (O1i and N1; symmetry code: (i) 1 - x, -y, -z) of the ligand are coordinated to the Ni1 atom to form six-membered and five-membered chelating rings, respectively, with a dihedral angle of 1.7 (4)°. Besides the above three atoms coordinated to the Ni1 atom, there are other three pyridine N atoms bonded to the Ni1 atom. So the coordination geometry of the Ni1 atom can be described as an N4O2 octahedron. As shown in Table 1, the axial Ni—N distances are longer than the equatorial Ni—N and Ni—O distances, which shows the NiII atom in a distorted octahedral geometry. This typical Jahn-Teller elongation has been observed in the other complexes (Kwak et al., 2000).
For related literature, see: Chen & Liu (2005); Dou et al. (2006); Kwak et al. (2000).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 1997); program(s) used to refine structure: SHELXL97 (Sheldrick, 1997); molecular graphics: SHELXTL (Siemens, 1996); software used to prepare material for publication: SHELXTL.
Fig. 1. The molecular structure of (I). Displacement ellipsoids are drawn at the 30% probability level. H atoms have been omitted for clarity. [Symmetry code: (i) 1 - x, -y, -z.] |
[Ni2(C14H8N2O4)(C5H5N)6]·2C5H5N | Dx = 1.292 Mg m−3 |
Mr = 1018.44 | Mo Kα radiation, λ = 0.71073 Å |
Tetragonal, I41/a | Cell parameters from 3046 reflections |
Hall symbol: -I 4ad | θ = 2.2–21.5° |
a = 27.040 (2) Å | µ = 0.77 mm−1 |
c = 14.3178 (18) Å | T = 298 K |
V = 10468.6 (17) Å3 | Block, red |
Z = 8 | 0.34 × 0.23 × 0.20 mm |
F(000) = 4240 |
Bruker SMART 1000 CCD area-detector diffractometer | 4609 independent reflections |
Radiation source: fine-focus sealed tube | 2743 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.064 |
φ and ω scans | θmax = 25.0°, θmin = 1.5° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −13→32 |
Tmin = 0.779, Tmax = 0.861 | k = −32→30 |
21466 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)] = 0.053 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.152 | H-atom parameters constrained |
S = 1.02 | w = 1/[σ2(Fo2) + (0.07P)2] where P = (Fo2 + 2Fc2)/3 |
4609 reflections | (Δ/σ)max < 0.001 |
316 parameters | Δρmax = 0.31 e Å−3 |
102 restraints | Δρmin = −0.43 e Å−3 |
[Ni2(C14H8N2O4)(C5H5N)6]·2C5H5N | Z = 8 |
Mr = 1018.44 | Mo Kα radiation |
Tetragonal, I41/a | µ = 0.77 mm−1 |
a = 27.040 (2) Å | T = 298 K |
c = 14.3178 (18) Å | 0.34 × 0.23 × 0.20 mm |
V = 10468.6 (17) Å3 |
Bruker SMART 1000 CCD area-detector diffractometer | 4609 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2743 reflections with I > 2σ(I) |
Tmin = 0.779, Tmax = 0.861 | Rint = 0.064 |
21466 measured reflections |
R[F2 > 2σ(F2)] = 0.053 | 102 restraints |
wR(F2) = 0.152 | H-atom parameters constrained |
S = 1.02 | Δρmax = 0.31 e Å−3 |
4609 reflections | Δρmin = −0.43 e Å−3 |
316 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. |
x | y | z | Uiso*/Ueq | ||
Ni1 | 0.547168 (18) | 0.061356 (19) | 0.07264 (4) | 0.0430 (2) | |
N1 | 0.50175 (11) | 0.00672 (11) | 0.0474 (2) | 0.0402 (8) | |
N2 | 0.49003 (13) | 0.11803 (14) | 0.0520 (3) | 0.0576 (9) | |
N3 | 0.61032 (12) | 0.01068 (13) | 0.0880 (3) | 0.0498 (9) | |
N4 | 0.59618 (12) | 0.12023 (12) | 0.0881 (2) | 0.0465 (9) | |
N5 | 0.7088 (6) | 0.3732 (4) | 0.3455 (7) | 0.175 (4) | |
O1 | 0.44541 (9) | −0.05583 (9) | 0.07017 (18) | 0.0443 (7) | |
O2 | 0.53200 (10) | 0.05767 (9) | 0.2084 (2) | 0.0492 (7) | |
C1 | 0.47284 (14) | −0.02083 (14) | 0.1014 (3) | 0.0384 (9) | |
C2 | 0.47115 (14) | −0.00872 (14) | 0.2032 (3) | 0.0381 (9) | |
C3 | 0.49896 (14) | 0.02951 (14) | 0.2477 (3) | 0.0420 (10) | |
C4 | 0.48975 (16) | 0.03587 (16) | 0.3447 (3) | 0.0501 (11) | |
H4 | 0.5068 | 0.0607 | 0.3761 | 0.060* | |
C5 | 0.45740 (16) | 0.00756 (17) | 0.3939 (3) | 0.0533 (11) | |
H5 | 0.4528 | 0.0135 | 0.4572 | 0.064* | |
C6 | 0.43109 (17) | −0.03022 (17) | 0.3502 (3) | 0.0565 (12) | |
H6 | 0.4094 | −0.0502 | 0.3836 | 0.068* | |
C7 | 0.43824 (14) | −0.03701 (16) | 0.2565 (3) | 0.0468 (10) | |
H7 | 0.4203 | −0.0617 | 0.2266 | 0.056* | |
C8 | 0.4812 (2) | 0.1372 (2) | −0.0297 (5) | 0.0941 (16) | |
H8 | 0.4977 | 0.1238 | −0.0807 | 0.113* | |
C9 | 0.4494 (2) | 0.1757 (3) | −0.0462 (5) | 0.1082 (17) | |
H9 | 0.4458 | 0.1884 | −0.1062 | 0.130* | |
C10 | 0.4239 (2) | 0.1948 (2) | 0.0245 (5) | 0.1061 (17) | |
H10 | 0.4014 | 0.2204 | 0.0154 | 0.127* | |
C11 | 0.4319 (3) | 0.1754 (3) | 0.1097 (5) | 0.1206 (19) | |
H11 | 0.4149 | 0.1876 | 0.1613 | 0.145* | |
C12 | 0.4651 (2) | 0.1376 (2) | 0.1203 (5) | 0.1042 (17) | |
H12 | 0.4702 | 0.1251 | 0.1801 | 0.125* | |
C13 | 0.61964 (19) | −0.02483 (18) | 0.0272 (4) | 0.0725 (15) | |
H13 | 0.5992 | −0.0278 | −0.0247 | 0.087* | |
C14 | 0.6578 (2) | −0.0574 (2) | 0.0369 (5) | 0.0954 (19) | |
H14 | 0.6626 | −0.0819 | −0.0077 | 0.115* | |
C15 | 0.6881 (2) | −0.0543 (3) | 0.1102 (6) | 0.101 (2) | |
H15 | 0.7142 | −0.0763 | 0.1176 | 0.121* | |
C16 | 0.6796 (2) | −0.0176 (3) | 0.1742 (5) | 0.109 (2) | |
H16 | 0.6998 | −0.0140 | 0.2264 | 0.131* | |
C17 | 0.6407 (2) | 0.0136 (2) | 0.1591 (4) | 0.0812 (17) | |
H17 | 0.6354 | 0.0388 | 0.2023 | 0.097* | |
C18 | 0.62427 (18) | 0.13505 (18) | 0.0177 (4) | 0.0663 (14) | |
H18 | 0.6214 | 0.1184 | −0.0389 | 0.080* | |
C19 | 0.65742 (19) | 0.17364 (19) | 0.0229 (4) | 0.0746 (15) | |
H19 | 0.6760 | 0.1828 | −0.0289 | 0.090* | |
C20 | 0.66227 (19) | 0.19768 (18) | 0.1045 (4) | 0.0708 (15) | |
H20 | 0.6844 | 0.2239 | 0.1104 | 0.085* | |
C21 | 0.6339 (2) | 0.18282 (19) | 0.1793 (4) | 0.0796 (16) | |
H21 | 0.6365 | 0.1987 | 0.2368 | 0.096* | |
C22 | 0.60200 (19) | 0.14440 (18) | 0.1675 (3) | 0.0679 (14) | |
H22 | 0.5831 | 0.1345 | 0.2185 | 0.081* | |
C23 | 0.6591 (6) | 0.3744 (4) | 0.3440 (8) | 0.159 (4) | |
H23 | 0.6407 | 0.3514 | 0.3775 | 0.191* | |
C24 | 0.6371 (4) | 0.4087 (7) | 0.2945 (11) | 0.185 (6) | |
H24 | 0.6029 | 0.4119 | 0.2979 | 0.223* | |
C25 | 0.6630 (7) | 0.4396 (4) | 0.2384 (10) | 0.166 (6) | |
H25 | 0.6465 | 0.4614 | 0.1990 | 0.199* | |
C26 | 0.7111 (7) | 0.4387 (4) | 0.2398 (8) | 0.177 (5) | |
H26 | 0.7291 | 0.4609 | 0.2036 | 0.213* | |
C27 | 0.7346 (3) | 0.4057 (5) | 0.2934 (11) | 0.156 (4) | |
H27 | 0.7690 | 0.4053 | 0.2948 | 0.187* |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ni1 | 0.0436 (3) | 0.0457 (3) | 0.0396 (3) | −0.0082 (2) | −0.0003 (2) | −0.0042 (2) |
N1 | 0.0420 (18) | 0.048 (2) | 0.0302 (17) | −0.0042 (16) | 0.0010 (15) | −0.0027 (15) |
N2 | 0.056 (2) | 0.060 (2) | 0.058 (2) | 0.0037 (18) | 0.0054 (18) | −0.0014 (18) |
N3 | 0.047 (2) | 0.049 (2) | 0.053 (2) | −0.0053 (17) | −0.0005 (18) | 0.0004 (18) |
N4 | 0.049 (2) | 0.044 (2) | 0.047 (2) | −0.0061 (16) | −0.0016 (17) | −0.0021 (17) |
N5 | 0.249 (13) | 0.146 (8) | 0.131 (8) | 0.039 (9) | −0.048 (8) | −0.037 (6) |
O1 | 0.0460 (16) | 0.0466 (16) | 0.0402 (17) | −0.0145 (13) | 0.0017 (12) | −0.0025 (13) |
O2 | 0.0572 (18) | 0.0501 (17) | 0.0403 (17) | −0.0147 (15) | 0.0006 (13) | −0.0016 (13) |
C1 | 0.037 (2) | 0.041 (2) | 0.037 (2) | 0.0008 (18) | 0.0024 (17) | 0.0012 (18) |
C2 | 0.039 (2) | 0.041 (2) | 0.034 (2) | 0.0028 (18) | −0.0001 (17) | 0.0000 (17) |
C3 | 0.041 (2) | 0.044 (2) | 0.041 (2) | 0.0062 (19) | −0.0039 (19) | −0.0007 (19) |
C4 | 0.056 (3) | 0.055 (3) | 0.039 (3) | 0.002 (2) | 0.000 (2) | −0.010 (2) |
C5 | 0.057 (3) | 0.069 (3) | 0.034 (2) | 0.004 (2) | 0.006 (2) | 0.000 (2) |
C6 | 0.055 (3) | 0.064 (3) | 0.050 (3) | −0.006 (2) | 0.012 (2) | 0.003 (2) |
C7 | 0.041 (2) | 0.055 (3) | 0.045 (3) | −0.005 (2) | 0.0049 (19) | −0.001 (2) |
C8 | 0.105 (3) | 0.096 (3) | 0.081 (3) | 0.040 (3) | 0.003 (3) | 0.006 (3) |
C9 | 0.119 (4) | 0.110 (4) | 0.096 (4) | 0.045 (3) | −0.003 (3) | 0.010 (3) |
C10 | 0.111 (4) | 0.104 (4) | 0.104 (4) | 0.046 (3) | 0.003 (3) | 0.010 (3) |
C11 | 0.133 (4) | 0.125 (4) | 0.105 (4) | 0.058 (3) | 0.022 (3) | 0.004 (3) |
C12 | 0.113 (4) | 0.114 (4) | 0.086 (4) | 0.056 (3) | 0.020 (3) | 0.013 (3) |
C13 | 0.085 (4) | 0.067 (3) | 0.066 (4) | 0.023 (3) | −0.008 (3) | −0.007 (3) |
C14 | 0.112 (5) | 0.091 (4) | 0.083 (5) | 0.044 (4) | 0.014 (4) | 0.005 (3) |
C15 | 0.071 (4) | 0.114 (6) | 0.118 (6) | 0.035 (4) | 0.003 (4) | 0.026 (5) |
C16 | 0.085 (5) | 0.109 (5) | 0.133 (7) | 0.011 (4) | −0.054 (4) | 0.001 (5) |
C17 | 0.075 (4) | 0.075 (4) | 0.093 (4) | 0.008 (3) | −0.031 (3) | −0.009 (3) |
C18 | 0.070 (3) | 0.070 (3) | 0.059 (3) | −0.021 (3) | 0.012 (3) | −0.006 (3) |
C19 | 0.070 (3) | 0.072 (4) | 0.082 (4) | −0.025 (3) | 0.011 (3) | 0.002 (3) |
C20 | 0.063 (3) | 0.055 (3) | 0.094 (4) | −0.020 (3) | −0.011 (3) | 0.004 (3) |
C21 | 0.088 (4) | 0.071 (4) | 0.080 (4) | −0.033 (3) | −0.006 (3) | −0.019 (3) |
C22 | 0.076 (3) | 0.071 (3) | 0.056 (3) | −0.028 (3) | 0.007 (3) | −0.012 (3) |
C23 | 0.184 (11) | 0.172 (11) | 0.121 (9) | 0.005 (10) | 0.069 (9) | 0.017 (7) |
C24 | 0.128 (9) | 0.245 (17) | 0.184 (14) | 0.104 (11) | −0.004 (8) | −0.064 (11) |
C25 | 0.223 (15) | 0.094 (7) | 0.181 (13) | 0.054 (9) | −0.090 (12) | −0.019 (7) |
C26 | 0.257 (16) | 0.071 (6) | 0.204 (12) | −0.036 (9) | −0.035 (11) | 0.032 (6) |
C27 | 0.131 (8) | 0.101 (7) | 0.235 (14) | −0.010 (7) | −0.024 (9) | −0.058 (8) |
Ni1—N1 | 1.955 (3) | C9—H9 | 0.9300 |
Ni1—O2 | 1.989 (3) | C10—C11 | 1.346 (9) |
Ni1—O1i | 2.060 (3) | C10—H10 | 0.9300 |
Ni1—N4 | 2.083 (3) | C11—C12 | 1.369 (8) |
Ni1—N2 | 2.196 (4) | C11—H11 | 0.9300 |
Ni1—N3 | 2.201 (3) | C12—H12 | 0.9300 |
N1—C1 | 1.328 (5) | C13—C14 | 1.363 (7) |
N1—N1i | 1.409 (6) | C13—H13 | 0.9300 |
N2—C12 | 1.300 (6) | C14—C15 | 1.335 (8) |
N2—C8 | 1.301 (6) | C14—H14 | 0.9300 |
N3—C17 | 1.310 (6) | C15—C16 | 1.371 (9) |
N3—C13 | 1.320 (6) | C15—H15 | 0.9300 |
N4—C22 | 1.320 (5) | C16—C17 | 1.366 (8) |
N4—C18 | 1.325 (5) | C16—H16 | 0.9300 |
N5—C23 | 1.345 (11) | C17—H17 | 0.9300 |
N5—C27 | 1.348 (11) | C18—C19 | 1.378 (6) |
O1—C1 | 1.283 (4) | C18—H18 | 0.9300 |
O1—Ni1i | 2.060 (3) | C19—C20 | 1.344 (7) |
O2—C3 | 1.302 (4) | C19—H19 | 0.9300 |
C1—C2 | 1.495 (5) | C20—C21 | 1.378 (7) |
C2—C7 | 1.399 (5) | C20—H20 | 0.9300 |
C2—C3 | 1.428 (5) | C21—C22 | 1.361 (6) |
C3—C4 | 1.421 (5) | C21—H21 | 0.9300 |
C4—C5 | 1.359 (5) | C22—H22 | 0.9300 |
C4—H4 | 0.9300 | C23—C24 | 1.310 (11) |
C5—C6 | 1.393 (6) | C23—H23 | 0.9300 |
C5—H5 | 0.9300 | C24—C25 | 1.354 (12) |
C6—C7 | 1.368 (6) | C24—H24 | 0.9300 |
C6—H6 | 0.9300 | C25—C26 | 1.30 (3) |
C7—H7 | 0.9300 | C25—H25 | 0.9300 |
C8—C9 | 1.371 (7) | C26—C27 | 1.337 (10) |
C8—H8 | 0.9300 | C26—H26 | 0.9300 |
C9—C10 | 1.329 (8) | C27—H27 | 0.9300 |
N1—Ni1—O2 | 90.75 (11) | C8—C9—H9 | 120.4 |
N1—Ni1—O1i | 79.81 (11) | C9—C10—C11 | 117.1 (7) |
O2—Ni1—O1i | 170.55 (10) | C9—C10—H10 | 121.4 |
N1—Ni1—N4 | 175.46 (13) | C11—C10—H10 | 121.4 |
O2—Ni1—N4 | 93.76 (12) | C10—C11—C12 | 119.8 (7) |
O1i—Ni1—N4 | 95.68 (12) | C10—C11—H11 | 120.1 |
N1—Ni1—N2 | 93.47 (13) | C12—C11—H11 | 120.1 |
O2—Ni1—N2 | 91.23 (13) | N2—C12—C11 | 124.1 (6) |
O1i—Ni1—N2 | 89.17 (13) | N2—C12—H12 | 118.0 |
N4—Ni1—N2 | 85.91 (13) | C11—C12—H12 | 118.0 |
N1—Ni1—N3 | 92.03 (13) | N3—C13—C14 | 123.2 (5) |
O2—Ni1—N3 | 91.77 (12) | N3—C13—H13 | 118.4 |
O1i—Ni1—N3 | 88.77 (12) | C14—C13—H13 | 118.4 |
N4—Ni1—N3 | 88.37 (12) | C15—C14—C13 | 120.3 (6) |
N2—Ni1—N3 | 173.70 (13) | C15—C14—H14 | 119.8 |
C1—N1—N1i | 112.1 (4) | C13—C14—H14 | 119.8 |
C1—N1—Ni1 | 133.4 (3) | C14—C15—C16 | 117.9 (6) |
N1i—N1—Ni1 | 114.5 (3) | C14—C15—H15 | 121.1 |
C12—N2—C8 | 114.8 (5) | C16—C15—H15 | 121.1 |
C12—N2—Ni1 | 123.2 (4) | C17—C16—C15 | 118.1 (6) |
C8—N2—Ni1 | 121.9 (4) | C17—C16—H16 | 120.9 |
C17—N3—C13 | 115.9 (4) | C15—C16—H16 | 120.9 |
C17—N3—Ni1 | 121.8 (3) | N3—C17—C16 | 124.6 (6) |
C13—N3—Ni1 | 122.3 (3) | N3—C17—H17 | 117.7 |
C22—N4—C18 | 115.9 (4) | C16—C17—H17 | 117.7 |
C22—N4—Ni1 | 123.1 (3) | N4—C18—C19 | 124.1 (5) |
C18—N4—Ni1 | 121.0 (3) | N4—C18—H18 | 117.9 |
C23—N5—C27 | 119.5 (9) | C19—C18—H18 | 117.9 |
C1—O1—Ni1i | 110.1 (2) | C20—C19—C18 | 118.5 (5) |
C3—O2—Ni1 | 126.4 (2) | C20—C19—H19 | 120.7 |
O1—C1—N1 | 123.5 (4) | C18—C19—H19 | 120.7 |
O1—C1—C2 | 118.9 (3) | C19—C20—C21 | 118.7 (5) |
N1—C1—C2 | 117.6 (3) | C19—C20—H20 | 120.6 |
C7—C2—C3 | 119.2 (4) | C21—C20—H20 | 120.6 |
C7—C2—C1 | 115.5 (3) | C22—C21—C20 | 118.6 (5) |
C3—C2—C1 | 125.3 (3) | C22—C21—H21 | 120.7 |
O2—C3—C4 | 118.2 (4) | C20—C21—H21 | 120.7 |
O2—C3—C2 | 126.3 (4) | N4—C22—C21 | 124.1 (5) |
C4—C3—C2 | 115.5 (4) | N4—C22—H22 | 117.9 |
C5—C4—C3 | 123.4 (4) | C21—C22—H22 | 117.9 |
C5—C4—H4 | 118.3 | C24—C23—N5 | 118.7 (9) |
C3—C4—H4 | 118.3 | C24—C23—H23 | 120.6 |
C4—C5—C6 | 120.6 (4) | N5—C23—H23 | 120.6 |
C4—C5—H5 | 119.7 | C23—C24—C25 | 121.5 (10) |
C6—C5—H5 | 119.7 | C23—C24—H24 | 119.3 |
C7—C6—C5 | 117.8 (4) | C25—C24—H24 | 119.3 |
C7—C6—H6 | 121.1 | C26—C25—C24 | 119.8 (10) |
C5—C6—H6 | 121.1 | C26—C25—H25 | 120.1 |
C6—C7—C2 | 123.4 (4) | C24—C25—H25 | 120.1 |
C6—C7—H7 | 118.3 | C25—C26—C27 | 119.7 (9) |
C2—C7—H7 | 118.3 | C25—C26—H26 | 120.1 |
N2—C8—C9 | 124.9 (6) | C27—C26—H26 | 120.1 |
N2—C8—H8 | 117.5 | C26—C27—N5 | 120.4 (9) |
C9—C8—H8 | 117.5 | C26—C27—H27 | 119.8 |
C10—C9—C8 | 119.3 (7) | N5—C27—H27 | 119.8 |
C10—C9—H9 | 120.4 |
Symmetry code: (i) −x+1, −y, −z. |
Experimental details
Crystal data | |
Chemical formula | [Ni2(C14H8N2O4)(C5H5N)6]·2C5H5N |
Mr | 1018.44 |
Crystal system, space group | Tetragonal, I41/a |
Temperature (K) | 298 |
a, c (Å) | 27.040 (2), 14.3178 (18) |
V (Å3) | 10468.6 (17) |
Z | 8 |
Radiation type | Mo Kα |
µ (mm−1) | 0.77 |
Crystal size (mm) | 0.34 × 0.23 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART 1000 CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.779, 0.861 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 21466, 4609, 2743 |
Rint | 0.064 |
(sin θ/λ)max (Å−1) | 0.595 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.053, 0.152, 1.02 |
No. of reflections | 4609 |
No. of parameters | 316 |
No. of restraints | 102 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.31, −0.43 |
Computer programs: SMART (Siemens, 1996), SAINT (Siemens, 1996), SAINT, SHELXS97 (Sheldrick, 1997), SHELXL97 (Sheldrick, 1997), SHELXTL (Siemens, 1996), SHELXTL.
Ni1—N1 | 1.955 (3) | Ni1—N4 | 2.083 (3) |
Ni1—O2 | 1.989 (3) | Ni1—N2 | 2.196 (4) |
Ni1—O1i | 2.060 (3) | Ni1—N3 | 2.201 (3) |
Symmetry code: (i) −x+1, −y, −z. |
Recently, we have synthesized two metallacrowns using N-acyl-3-hydroxy-2-naphthalenecarbohydrazide (Dou et al., 2006). As an extension of our work on the structural characterization of naphthalenecarbohydrazide compounds, the title complex, (I), was synthesized and characterized by X-ray diffraction.
The complex (I) (space group I41/a) is a polymorph of the compound (space group P21/c) previously reported by Chen & Liu (2005), with the same formula [Ni2(C14H8N2O4)(C5H5N)6].2C5H5N. The complex molecule of (I) lies on an inversion center (Fig. 1). The 1,2-disalicyloylhydrazine molecule acts as a hexadentate tetravalent anionic ligand linking two NiII atoms. The iminophenolate group (O2 and N1) and the iminoacyl group (O1i and N1; symmetry code: (i) 1 - x, -y, -z) of the ligand are coordinated to the Ni1 atom to form six-membered and five-membered chelating rings, respectively, with a dihedral angle of 1.7 (4)°. Besides the above three atoms coordinated to the Ni1 atom, there are other three pyridine N atoms bonded to the Ni1 atom. So the coordination geometry of the Ni1 atom can be described as an N4O2 octahedron. As shown in Table 1, the axial Ni—N distances are longer than the equatorial Ni—N and Ni—O distances, which shows the NiII atom in a distorted octahedral geometry. This typical Jahn-Teller elongation has been observed in the other complexes (Kwak et al., 2000).