metal-organic compounds
Bis{2-[2-(isopropylammonio)ethyliminomethyl]-6-methoxyphenolato}nickel(II) dithiocyanate
aDepartment of Nutrition, Jilin Medical College, Jilin 132013, People's Republic of China, bDepartment of Biochemistry, Jilin Medical College, Jilin 132013, People's Republic of China, and cDepartment of Pharmacopedics, Jilin Medical College, Jilin 132013, People's Republic of China
*Correspondence e-mail: jlcpcxb@yahoo.com.cn
The title complex, [Ni(C13H20N2O2)2](NCS)2, consists of a centrosymmetric mononuclear four-coordinate nickel(II) complex cation and two thiocyanate anions. The Ni atom is located on an inversion center and is coordinated by two phenol O atoms and two imine N atoms from two equivalent Schiff base ligands, in a square-planar geometry. In the the amino H atoms are involved in N—H⋯O hydrogen bonds with the phenol and methoxy O atoms of the ligand, and in N—H⋯N hydrogen bonds with the N atoms of the thiocyanate anions, which sit above and below the Ni atom.
Related literature
For background on the chemistry of Schiff base nickel(II) complexes, see: Marganian et al. (1995). For their biological activity, see: Harrop et al. (2003); Brückner et al. (2000); Ren et al. (2002). For thiocyanate-coordinated complexes, see: Bogdanović et al. (2005); Schottenfeld et al. (2007); Abul-Haj et al. (2000). For related structures, see: Arıcı et al. (2005); Diao (2007); Diao et al. (2007); Zhu et al. (2004); Van Hecke et al. (2007); de Castro et al. (2001).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 2007); cell SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL; molecular graphics: SHELXTL; software used to prepare material for publication: SHELXTL.
Supporting information
10.1107/S1600536808008052/su2049sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: 10.1107/S1600536808008052/su2049Isup2.hkl
3-Methoxysalicylaldehyde (1.0 mmol, 152.0 mg), N-isopropylethane-1,2-diamine (1.0 mmol, 122.2 mg), ammonium thiocyanate (1.0 mmol, 76.0 mg), and Ni(NO3)2.6H2O (0.5 mmol, 145.0 mg) were dissolved in methanol (50 ml). The mixture was stirred at reflux for 2h to give a reddish solution. After keeping the solution in air for a few days, red block-like crystals were formed.
H atoms were positioned geometrically and refined using a riding model with d(N—H) = 0.90 Å, Uiso = 1.2Ueq(N), and d(C—H) = 0.93 - 0.97 Å, Uiso = 1.2 or 1.5Ueq (C).
Data collection: SMART (Bruker, 2007); cell
SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXTL (Sheldrick, 2008); program(s) used to refine structure: SHELXTL (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).Fig. 1. The molecular structure of complex (I), with displacement ellipsoids drawn at the 30% probability level. |
[Ni(C13H20N2O2)2](NCS)2 | Dx = 1.345 Mg m−3 |
Mr = 647.49 | Mo Kα radiation, λ = 0.71073 Å |
Orthorhombic, Pbca | Cell parameters from 1440 reflections |
a = 13.520 (2) Å | θ = 2.3–24.6° |
b = 9.810 (3) Å | µ = 0.78 mm−1 |
c = 24.102 (3) Å | T = 298 K |
V = 3196.7 (12) Å3 | Block, red |
Z = 4 | 0.23 × 0.22 × 0.20 mm |
F(000) = 1368 |
Bruker SMART CCD area-detector diffractometer | 3863 independent reflections |
Radiation source: fine-focus sealed tube | 1895 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.110 |
ω scans | θmax = 28.3°, θmin = 1.7° |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | h = −17→17 |
Tmin = 0.841, Tmax = 0.860 | k = −12→12 |
24542 measured reflections | l = −31→31 |
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)] = 0.070 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.175 | H-atom parameters constrained |
S = 1.01 | w = 1/[σ2(Fo2) + (0.0594P)2 + 2.0547P] where P = (Fo2 + 2Fc2)/3 |
3863 reflections | (Δ/σ)max = 0.001 |
190 parameters | Δρmax = 0.29 e Å−3 |
6 restraints | Δρmin = −0.38 e Å−3 |
[Ni(C13H20N2O2)2](NCS)2 | V = 3196.7 (12) Å3 |
Mr = 647.49 | Z = 4 |
Orthorhombic, Pbca | Mo Kα radiation |
a = 13.520 (2) Å | µ = 0.78 mm−1 |
b = 9.810 (3) Å | T = 298 K |
c = 24.102 (3) Å | 0.23 × 0.22 × 0.20 mm |
Bruker SMART CCD area-detector diffractometer | 3863 independent reflections |
Absorption correction: multi-scan (SADABS; Bruker, 2001) | 1895 reflections with I > 2σ(I) |
Tmin = 0.841, Tmax = 0.860 | Rint = 0.110 |
24542 measured reflections |
R[F2 > 2σ(F2)] = 0.070 | 6 restraints |
wR(F2) = 0.175 | H-atom parameters constrained |
S = 1.01 | Δρmax = 0.29 e Å−3 |
3863 reflections | Δρmin = −0.38 e Å−3 |
190 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 | 0.0000 | 0.5000 | 0.5000 | 0.0503 (3) | |
O1 | 0.0862 (2) | 0.5589 (3) | 0.55717 (11) | 0.0595 (8) | |
O2 | 0.1713 (2) | 0.7110 (3) | 0.62919 (13) | 0.0679 (9) | |
S1 | 0.12952 (16) | 0.8799 (3) | 0.34887 (10) | 0.1446 (9) | |
N1 | 0.1017 (2) | 0.3634 (3) | 0.47434 (13) | 0.0462 (8) | |
N2 | 0.0395 (3) | 0.4013 (3) | 0.35925 (13) | 0.0511 (9) | |
H2A | 0.0740 | 0.4743 | 0.3710 | 0.061* | |
H2B | −0.0197 | 0.4034 | 0.3763 | 0.061* | |
N3 | 0.1018 (5) | 0.6596 (5) | 0.4145 (3) | 0.123 (2) | |
C1 | 0.1838 (3) | 0.5537 (4) | 0.55731 (16) | 0.0479 (10) | |
C2 | 0.2397 (3) | 0.4670 (4) | 0.52411 (17) | 0.0474 (10) | |
C3 | 0.3429 (3) | 0.4673 (5) | 0.5277 (2) | 0.0566 (12) | |
H3 | 0.3799 | 0.4086 | 0.5056 | 0.068* | |
C4 | 0.3893 (3) | 0.5529 (5) | 0.5634 (2) | 0.0659 (13) | |
H4 | 0.4581 | 0.5543 | 0.5648 | 0.079* | |
C5 | 0.3353 (3) | 0.6389 (5) | 0.59804 (19) | 0.0610 (13) | |
H5 | 0.3678 | 0.6967 | 0.6226 | 0.073* | |
C6 | 0.2337 (3) | 0.6377 (4) | 0.59571 (17) | 0.0523 (11) | |
C7 | 0.2135 (4) | 0.8054 (5) | 0.6670 (2) | 0.0850 (16) | |
H7A | 0.2530 | 0.7573 | 0.6937 | 0.127* | |
H7B | 0.1617 | 0.8540 | 0.6857 | 0.127* | |
H7C | 0.2544 | 0.8687 | 0.6471 | 0.127* | |
C8 | 0.1937 (3) | 0.3693 (4) | 0.48742 (15) | 0.0493 (11) | |
H8 | 0.2349 | 0.3040 | 0.4717 | 0.059* | |
C9 | 0.0744 (3) | 0.2481 (4) | 0.43785 (17) | 0.0553 (11) | |
H9A | 0.0050 | 0.2267 | 0.4433 | 0.066* | |
H9B | 0.1126 | 0.1686 | 0.4484 | 0.066* | |
C10 | 0.0920 (3) | 0.2777 (4) | 0.37715 (17) | 0.0560 (11) | |
H10A | 0.1623 | 0.2892 | 0.3707 | 0.067* | |
H10B | 0.0697 | 0.2009 | 0.3551 | 0.067* | |
C11 | 0.0231 (4) | 0.4150 (5) | 0.29841 (17) | 0.0681 (14) | |
H11 | −0.0102 | 0.3323 | 0.2853 | 0.082* | |
C12 | 0.1198 (4) | 0.4270 (7) | 0.2686 (2) | 0.119 (2) | |
H12A | 0.1559 | 0.5037 | 0.2829 | 0.178* | |
H12B | 0.1080 | 0.4397 | 0.2297 | 0.178* | |
H12C | 0.1577 | 0.3453 | 0.2741 | 0.178* | |
C13 | −0.0449 (5) | 0.5349 (6) | 0.2881 (2) | 0.0964 (19) | |
H13A | −0.1083 | 0.5172 | 0.3045 | 0.145* | |
H13B | −0.0526 | 0.5481 | 0.2489 | 0.145* | |
H13C | −0.0169 | 0.6155 | 0.3043 | 0.145* | |
C14 | 0.1096 (5) | 0.7465 (7) | 0.3872 (3) | 0.095 (2) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ni1 | 0.0405 (4) | 0.0602 (5) | 0.0501 (4) | 0.0056 (4) | −0.0042 (4) | −0.0156 (4) |
O1 | 0.0406 (17) | 0.084 (2) | 0.0535 (18) | 0.0023 (15) | 0.0001 (14) | −0.0189 (16) |
O2 | 0.066 (2) | 0.069 (2) | 0.068 (2) | −0.0026 (17) | −0.0098 (17) | −0.0192 (18) |
S1 | 0.1218 (16) | 0.166 (2) | 0.1462 (18) | 0.0331 (15) | 0.0288 (14) | 0.0599 (16) |
N1 | 0.049 (2) | 0.049 (2) | 0.0408 (19) | −0.0021 (17) | 0.0034 (16) | 0.0038 (16) |
N2 | 0.057 (2) | 0.052 (2) | 0.045 (2) | 0.0072 (18) | 0.0093 (17) | −0.0007 (17) |
N3 | 0.162 (5) | 0.062 (3) | 0.147 (5) | 0.011 (3) | −0.065 (4) | 0.008 (3) |
C1 | 0.046 (3) | 0.053 (2) | 0.045 (2) | −0.002 (2) | −0.004 (2) | 0.008 (2) |
C2 | 0.049 (3) | 0.050 (3) | 0.043 (2) | 0.004 (2) | 0.001 (2) | 0.0088 (19) |
C3 | 0.042 (3) | 0.067 (3) | 0.060 (3) | 0.004 (2) | 0.002 (2) | 0.007 (2) |
C4 | 0.045 (3) | 0.082 (3) | 0.071 (3) | −0.003 (3) | −0.006 (2) | 0.014 (3) |
C5 | 0.061 (3) | 0.063 (3) | 0.059 (3) | −0.015 (2) | −0.016 (2) | 0.017 (2) |
C6 | 0.052 (3) | 0.052 (3) | 0.053 (3) | −0.003 (2) | −0.005 (2) | 0.008 (2) |
C7 | 0.107 (4) | 0.069 (3) | 0.079 (4) | −0.008 (3) | −0.023 (3) | −0.013 (3) |
C8 | 0.054 (3) | 0.056 (3) | 0.038 (2) | 0.011 (2) | 0.0101 (19) | 0.0086 (19) |
C9 | 0.071 (3) | 0.045 (2) | 0.051 (3) | 0.004 (2) | 0.003 (2) | −0.001 (2) |
C10 | 0.070 (3) | 0.048 (3) | 0.050 (3) | 0.012 (2) | 0.000 (2) | −0.004 (2) |
C11 | 0.095 (4) | 0.065 (3) | 0.044 (3) | 0.010 (3) | −0.001 (3) | −0.001 (2) |
C12 | 0.141 (6) | 0.157 (6) | 0.058 (4) | 0.035 (5) | 0.041 (4) | 0.028 (4) |
C13 | 0.137 (5) | 0.080 (4) | 0.072 (4) | 0.032 (4) | −0.025 (4) | 0.007 (3) |
C14 | 0.095 (4) | 0.075 (4) | 0.116 (5) | 0.015 (4) | −0.039 (4) | −0.022 (4) |
Ni1—O1i | 1.895 (3) | C4—H4 | 0.9300 |
Ni1—O1 | 1.895 (3) | C5—C6 | 1.374 (6) |
Ni1—N1i | 2.017 (3) | C5—H5 | 0.9300 |
Ni1—N1 | 2.017 (3) | C7—H7A | 0.9600 |
O1—C1 | 1.320 (5) | C7—H7B | 0.9600 |
O2—C6 | 1.371 (5) | C7—H7C | 0.9600 |
O2—C7 | 1.418 (5) | C8—H8 | 0.9300 |
S1—C14 | 1.624 (8) | C9—C10 | 1.511 (5) |
N1—C8 | 1.285 (5) | C9—H9A | 0.9700 |
N1—C9 | 1.479 (5) | C9—H9B | 0.9700 |
N2—C10 | 1.470 (5) | C10—H10A | 0.9700 |
N2—C11 | 1.489 (5) | C10—H10B | 0.9700 |
N2—H2A | 0.9000 | C11—C12 | 1.497 (7) |
N2—H2B | 0.9000 | C11—C13 | 1.513 (7) |
N3—C14 | 1.082 (7) | C11—H11 | 0.9800 |
C1—C2 | 1.391 (6) | C12—H12A | 0.9600 |
C1—C6 | 1.412 (5) | C12—H12B | 0.9600 |
C2—C3 | 1.399 (6) | C12—H12C | 0.9600 |
C2—C8 | 1.445 (6) | C13—H13A | 0.9600 |
C3—C4 | 1.356 (6) | C13—H13B | 0.9600 |
C3—H3 | 0.9300 | C13—H13C | 0.9600 |
C4—C5 | 1.393 (6) | ||
O1i—Ni1—O1 | 180.000 (1) | O2—C7—H7C | 109.5 |
O1i—Ni1—N1i | 90.38 (13) | H7A—C7—H7C | 109.5 |
O1—Ni1—N1i | 89.62 (13) | H7B—C7—H7C | 109.5 |
O1i—Ni1—N1 | 89.62 (13) | N1—C8—C2 | 126.7 (4) |
O1—Ni1—N1 | 90.38 (13) | N1—C8—H8 | 116.7 |
N1i—Ni1—N1 | 180.00 (17) | C2—C8—H8 | 116.7 |
C1—O1—Ni1 | 127.2 (3) | N1—C9—C10 | 112.9 (3) |
C6—O2—C7 | 118.2 (4) | N1—C9—H9A | 109.0 |
C8—N1—C9 | 115.0 (4) | C10—C9—H9A | 109.0 |
C8—N1—Ni1 | 123.7 (3) | N1—C9—H9B | 109.0 |
C9—N1—Ni1 | 121.4 (3) | C10—C9—H9B | 109.0 |
C10—N2—C11 | 115.8 (3) | H9A—C9—H9B | 107.8 |
C10—N2—H2A | 108.3 | N2—C10—C9 | 111.5 (3) |
C11—N2—H2A | 108.3 | N2—C10—H10A | 109.3 |
C10—N2—H2B | 108.3 | C9—C10—H10A | 109.3 |
C11—N2—H2B | 108.3 | N2—C10—H10B | 109.3 |
H2A—N2—H2B | 107.4 | C9—C10—H10B | 109.3 |
O1—C1—C2 | 124.4 (4) | H10A—C10—H10B | 108.0 |
O1—C1—C6 | 117.2 (4) | N2—C11—C12 | 110.4 (4) |
C2—C1—C6 | 118.3 (4) | N2—C11—C13 | 108.8 (4) |
C1—C2—C3 | 120.3 (4) | C12—C11—C13 | 113.0 (5) |
C1—C2—C8 | 121.6 (4) | N2—C11—H11 | 108.2 |
C3—C2—C8 | 118.0 (4) | C12—C11—H11 | 108.2 |
C4—C3—C2 | 120.2 (4) | C13—C11—H11 | 108.2 |
C4—C3—H3 | 119.9 | C11—C12—H12A | 109.5 |
C2—C3—H3 | 119.9 | C11—C12—H12B | 109.5 |
C3—C4—C5 | 120.8 (4) | H12A—C12—H12B | 109.5 |
C3—C4—H4 | 119.6 | C11—C12—H12C | 109.5 |
C5—C4—H4 | 119.6 | H12A—C12—H12C | 109.5 |
C6—C5—C4 | 119.6 (4) | H12B—C12—H12C | 109.5 |
C6—C5—H5 | 120.2 | C11—C13—H13A | 109.5 |
C4—C5—H5 | 120.2 | C11—C13—H13B | 109.5 |
O2—C6—C5 | 125.9 (4) | H13A—C13—H13B | 109.5 |
O2—C6—C1 | 113.4 (4) | C11—C13—H13C | 109.5 |
C5—C6—C1 | 120.7 (4) | H13A—C13—H13C | 109.5 |
O2—C7—H7A | 109.5 | H13B—C13—H13C | 109.5 |
O2—C7—H7B | 109.5 | N3—C14—S1 | 175.4 (7) |
H7A—C7—H7B | 109.5 |
Symmetry code: (i) −x, −y+1, −z+1. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···O2i | 0.90 | 2.34 | 3.068 (5) | 138 |
N2—H2B···O1i | 0.90 | 1.88 | 2.664 (4) | 145 |
N2—H2A···N3 | 0.90 | 2.13 | 2.983 (6) | 158 |
Symmetry code: (i) −x, −y+1, −z+1. |
Experimental details
Crystal data | |
Chemical formula | [Ni(C13H20N2O2)2](NCS)2 |
Mr | 647.49 |
Crystal system, space group | Orthorhombic, Pbca |
Temperature (K) | 298 |
a, b, c (Å) | 13.520 (2), 9.810 (3), 24.102 (3) |
V (Å3) | 3196.7 (12) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.78 |
Crystal size (mm) | 0.23 × 0.22 × 0.20 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector diffractometer |
Absorption correction | Multi-scan (SADABS; Bruker, 2001) |
Tmin, Tmax | 0.841, 0.860 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 24542, 3863, 1895 |
Rint | 0.110 |
(sin θ/λ)max (Å−1) | 0.667 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.070, 0.175, 1.01 |
No. of reflections | 3863 |
No. of parameters | 190 |
No. of restraints | 6 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.29, −0.38 |
Computer programs: SMART (Bruker, 2007), SAINT (Bruker, 2007), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···O2i | 0.90 | 2.34 | 3.068 (5) | 137.9 |
N2—H2B···O1i | 0.90 | 1.88 | 2.664 (4) | 145.2 |
N2—H2A···N3 | 0.90 | 2.13 | 2.983 (6) | 157.6 |
Symmetry code: (i) −x, −y+1, −z+1. |
Acknowledgements
The project was supported financially by Jilin Medical College.
References
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Nickel(II) complexes derived from Schiff bases have been widely studied (Marganian et al., 1995). Some of them have been found to have pharmacological and antitumor properties (Harrop et al., 2003; Brückner et al., 2000; Ren et al., 2002). The thiocyanate ligand displays a number of coordination modes and has become one of the most extensively studied building blocks in the synthesis of complexes (Bogdanović et al., 2005; Schottenfeld et al., 2007; Abul-Haj et al., 2000), however, the thiocyanate group acting as a counterion in complexes has seldom been reported. We report herein the crystal structure of the title nickel(II) complex (I).
Complex (I) consists of a centrosymmetric mononuclear four-coordinated nickel(II) complex molecule and two thiocyanate anions (Fig. 1). The Ni atom is located on an inversion center and coordinated, by two phenolic O atoms and two imine N atoms from two equivalent Schiff base ligands, in a square planar geometry. The thiocyanate anions act as counterions and are not coordinate to the nickel(II) atom (Fig. 1). All the coordinate bond values are similar to those observed in other Schiff base nickel(II) complexes (Arıcı et al., 2005; Diao, 2007; Diao et al., 2007; Zhu et al., 2004; Van Hecke et al., 2007; de Castro et al., 2001).
In the crystal structure of (I) the amino H-atoms are involved in N-H···O hydrogen bonds with the phenolic and methoxy O atoms of the ligand, and in N-H···N hydrogen bonds with the N-atom of the thiocyanate anions, which sit above and below the nickel atom (Table 1).