metal-organic compounds
Bis{2-ethoxy-6-[2-(isopropylammonio)ethyliminomethyl]phenolato}dithiocyanatonickel(II)
aDepartment of Chemistry, Huzhou University, Huzhou 313000, People's Republic of China
*Correspondence e-mail: chenyi_wang@163.com
In the mononuclear title complex, [Ni(NCS)2(C14H22N2O2)2], the Ni atom lies on an inversion centre. It is chelated by the phenolate O and imine N atoms from two zwitterionic Schiff base ligands, and is also coordinated by the N atoms from two thiocyanate ligands, giving a slightly distorted octahedral geometry. Intramolecular N—H⋯O and N—H⋯N hydrogen bonds are observed.
Related literature
For related structures, see: Ali et al. (2004); Sarı et al. (2006); Gomes et al. (2000); Su et al. (2006); Wang (2007).
Experimental
Crystal data
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Refinement
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Data collection: SMART (Bruker, 1998); cell SAINT (Bruker, 1998); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supporting information
https://doi.org/10.1107/S1600536809055780/ci5007sup1.cif
contains datablocks global, I. DOI:Structure factors: contains datablock I. DOI: https://doi.org/10.1107/S1600536809055780/ci5007Isup2.hkl
3-Ethoxysalicylaldehyde (0.2 mmol, 33.2 mg) and N-isopropylethane-1,2-diamine (0.2 mmol, 20.4 mg) were dissolved in MeOH (10 ml). The mixture was stirred at room temperature for 10 min to give a clear yellow solution. To this solution was added an aqueous solution (2 ml) of ammonium thiocyanate (0.2 mmol, 15.2 mg) and an aqueous solution (3 ml) of Ni(CH3COO)2.4H2O (0.1 mmol, 24.9 mg) with stirring. The resulting mixture was stirred for another 10 min at room temperature. After keeping the filtrate in air for three days, green block-shaped crystals were formed at the bottom of the vessel.
All H atoms were placed in geometrically idealized positions and constrained to ride on their parent atoms, with C–H distances in the range 0.93–0.98 Å, N–H distance of 0.90 Å, and with Uiso(H) set at 1.2Ueq(C,N) and 1.5Ueq(methyl C).
As part of our investigations into novel urease inhibitors, we have synthesized the title compound, a new NiII complex. The Ni atom lies on an inversion centre; it is chelated by the phenolate O and imine N atoms from two Schiff base ligands, and is coordinated by the N atoms from two thiocyanate ligands (Fig. 1). While the three trans angles at Ni centre are 180° by symmetry, the other angles are close to 90°, ranging from 88.35 (9) to 91.65 (9)°, indicating a slightly distorted octahedral coordination. The Ni—O and Ni—N bond lengths (Table 1) are typical and are comparable with those observed in other similar nickel(II) complexes (Ali et al., 2004; Sarı et al., 2006; Gomes et al., 2000; Su et al., 2006) and the nickel(II) complex we reported previously (Wang, 2007). The amine N atoms of the Schiff base ligands are protonated and take no part in the coordination to the Ni atom.
For related structures, see: Ali et al. (2004); Sarı et al. (2006); Gomes et al. (2000); Su et al. (2006); Wang (2007).
Data collection: SMART (Bruker, 1998); cell
SAINT (Bruker, 1998); data reduction: SAINT (Bruker, 1998); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL (Sheldrick, 2008).[Ni(NCS)2(C14H22N2O2)2] | F(000) = 1432 |
Mr = 675.54 | Dx = 1.335 Mg m−3 |
Monoclinic, C2/c | Mo Kα radiation, λ = 0.71073 Å |
Hall symbol: -C 2yc | Cell parameters from 1966 reflections |
a = 24.958 (3) Å | θ = 2.6–24.0° |
b = 14.016 (2) Å | µ = 0.74 mm−1 |
c = 9.613 (2) Å | T = 298 K |
β = 91.73 (2)° | Block, green |
V = 3361.2 (9) Å3 | 0.32 × 0.30 × 0.30 mm |
Z = 4 |
Bruker SMART CCD area-detector diffractometer | 3553 independent reflections |
Radiation source: fine-focus sealed tube | 2395 reflections with I > 2σ(I) |
Graphite monochromator | Rint = 0.046 |
ω scan | θmax = 26.8°, θmin = 1.6° |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | h = −22→31 |
Tmin = 0.797, Tmax = 0.808 | k = −17→17 |
9655 measured reflections | l = −12→11 |
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)] = 0.046 | Hydrogen site location: inferred from neighbouring sites |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.03 | w = 1/[σ2(Fo2) + (0.0479P)2 + 1.6478P] where P = (Fo2 + 2Fc2)/3 |
3553 reflections | (Δ/σ)max = 0.001 |
199 parameters | Δρmax = 0.56 e Å−3 |
0 restraints | Δρmin = −0.36 e Å−3 |
[Ni(NCS)2(C14H22N2O2)2] | V = 3361.2 (9) Å3 |
Mr = 675.54 | Z = 4 |
Monoclinic, C2/c | Mo Kα radiation |
a = 24.958 (3) Å | µ = 0.74 mm−1 |
b = 14.016 (2) Å | T = 298 K |
c = 9.613 (2) Å | 0.32 × 0.30 × 0.30 mm |
β = 91.73 (2)° |
Bruker SMART CCD area-detector diffractometer | 3553 independent reflections |
Absorption correction: multi-scan (SADABS; Sheldrick, 1996) | 2395 reflections with I > 2σ(I) |
Tmin = 0.797, Tmax = 0.808 | Rint = 0.046 |
9655 measured reflections |
R[F2 > 2σ(F2)] = 0.046 | 0 restraints |
wR(F2) = 0.115 | H-atom parameters constrained |
S = 1.03 | Δρmax = 0.56 e Å−3 |
3553 reflections | Δρmin = −0.36 e Å−3 |
199 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 | 0.2500 | 0.2500 | 0.0000 | 0.03705 (17) | |
O1 | 0.18825 (7) | 0.33463 (12) | 0.0484 (2) | 0.0439 (5) | |
O2 | 0.12016 (8) | 0.42012 (14) | 0.2074 (2) | 0.0484 (5) | |
S1 | 0.37620 (4) | 0.37891 (7) | 0.36139 (11) | 0.0705 (3) | |
N1 | 0.27311 (9) | 0.35271 (15) | −0.1418 (2) | 0.0377 (5) | |
N2 | 0.38216 (9) | 0.29760 (16) | −0.0841 (2) | 0.0432 (6) | |
H2A | 0.3686 | 0.2381 | −0.0859 | 0.052* | |
H2B | 0.3664 | 0.3293 | −0.0149 | 0.052* | |
N3 | 0.30222 (10) | 0.31802 (17) | 0.1565 (3) | 0.0497 (6) | |
C1 | 0.22283 (11) | 0.48279 (19) | −0.0372 (3) | 0.0372 (6) | |
C2 | 0.18949 (10) | 0.42827 (19) | 0.0487 (3) | 0.0359 (6) | |
C3 | 0.15393 (11) | 0.4786 (2) | 0.1343 (3) | 0.0394 (6) | |
C4 | 0.15390 (12) | 0.5763 (2) | 0.1397 (3) | 0.0471 (7) | |
H4 | 0.1314 | 0.6077 | 0.2001 | 0.057* | |
C5 | 0.18746 (12) | 0.6288 (2) | 0.0548 (3) | 0.0503 (8) | |
H5 | 0.1875 | 0.6951 | 0.0588 | 0.060* | |
C6 | 0.22023 (12) | 0.5825 (2) | −0.0339 (3) | 0.0450 (7) | |
H6 | 0.2412 | 0.6179 | −0.0933 | 0.054* | |
C7 | 0.25761 (10) | 0.43974 (19) | −0.1374 (3) | 0.0384 (6) | |
H7 | 0.2701 | 0.4798 | −0.2064 | 0.046* | |
C8 | 0.30827 (11) | 0.3277 (2) | −0.2564 (3) | 0.0443 (7) | |
H8A | 0.2984 | 0.3656 | −0.3377 | 0.053* | |
H8B | 0.3032 | 0.2610 | −0.2803 | 0.053* | |
C9 | 0.36703 (12) | 0.3451 (2) | −0.2178 (3) | 0.0490 (8) | |
H9A | 0.3892 | 0.3206 | −0.2909 | 0.059* | |
H9B | 0.3735 | 0.4131 | −0.2096 | 0.059* | |
C10 | 0.44096 (12) | 0.2910 (2) | −0.0492 (4) | 0.0541 (8) | |
H10 | 0.4589 | 0.2635 | −0.1292 | 0.065* | |
C11 | 0.44931 (14) | 0.2249 (3) | 0.0734 (4) | 0.0694 (10) | |
H11A | 0.4316 | 0.2504 | 0.1524 | 0.104* | |
H11B | 0.4870 | 0.2189 | 0.0949 | 0.104* | |
H11C | 0.4347 | 0.1633 | 0.0508 | 0.104* | |
C12 | 0.46405 (16) | 0.3893 (3) | −0.0211 (6) | 0.1071 (17) | |
H12A | 0.4603 | 0.4275 | −0.1037 | 0.161* | |
H12B | 0.5013 | 0.3837 | 0.0053 | 0.161* | |
H12C | 0.4451 | 0.4189 | 0.0529 | 0.161* | |
C13 | 0.08606 (12) | 0.4648 (2) | 0.3028 (3) | 0.0563 (9) | |
H13A | 0.0604 | 0.5053 | 0.2531 | 0.068* | |
H13B | 0.1070 | 0.5044 | 0.3668 | 0.068* | |
C14 | 0.05710 (14) | 0.3895 (3) | 0.3819 (4) | 0.0724 (11) | |
H14A | 0.0356 | 0.3517 | 0.3183 | 0.109* | |
H14B | 0.0344 | 0.4193 | 0.4482 | 0.109* | |
H14C | 0.0827 | 0.3493 | 0.4299 | 0.109* | |
C15 | 0.33283 (12) | 0.3433 (2) | 0.2408 (3) | 0.0438 (7) |
U11 | U22 | U33 | U12 | U13 | U23 | |
Ni1 | 0.0367 (3) | 0.0311 (3) | 0.0435 (3) | 0.0001 (2) | 0.0046 (2) | −0.0003 (2) |
O1 | 0.0428 (12) | 0.0310 (10) | 0.0586 (13) | −0.0001 (8) | 0.0105 (10) | 0.0010 (9) |
O2 | 0.0490 (12) | 0.0497 (12) | 0.0474 (12) | 0.0007 (10) | 0.0132 (10) | −0.0036 (10) |
S1 | 0.0687 (6) | 0.0665 (6) | 0.0751 (7) | −0.0097 (5) | −0.0174 (5) | −0.0083 (5) |
N1 | 0.0360 (13) | 0.0375 (13) | 0.0394 (13) | −0.0004 (10) | 0.0017 (10) | −0.0029 (10) |
N2 | 0.0396 (14) | 0.0363 (13) | 0.0540 (15) | −0.0037 (10) | 0.0075 (11) | −0.0004 (12) |
N3 | 0.0552 (17) | 0.0441 (15) | 0.0498 (16) | 0.0005 (12) | 0.0023 (13) | −0.0015 (12) |
C1 | 0.0383 (16) | 0.0340 (15) | 0.0390 (15) | 0.0023 (12) | −0.0022 (12) | −0.0009 (12) |
C2 | 0.0353 (15) | 0.0330 (15) | 0.0392 (15) | 0.0026 (11) | −0.0020 (12) | −0.0011 (12) |
C3 | 0.0392 (16) | 0.0421 (17) | 0.0367 (15) | 0.0039 (12) | −0.0022 (12) | −0.0033 (12) |
C4 | 0.0515 (18) | 0.0445 (18) | 0.0454 (18) | 0.0079 (14) | 0.0017 (14) | −0.0082 (14) |
C5 | 0.064 (2) | 0.0304 (15) | 0.0558 (19) | 0.0057 (14) | −0.0067 (17) | −0.0038 (14) |
C6 | 0.0498 (18) | 0.0369 (16) | 0.0484 (18) | 0.0005 (14) | 0.0011 (14) | 0.0022 (13) |
C7 | 0.0379 (16) | 0.0380 (16) | 0.0393 (15) | −0.0030 (12) | 0.0011 (12) | 0.0033 (12) |
C8 | 0.0449 (17) | 0.0471 (17) | 0.0414 (16) | 0.0045 (13) | 0.0074 (13) | 0.0014 (13) |
C9 | 0.0470 (18) | 0.0500 (18) | 0.0506 (18) | 0.0039 (14) | 0.0127 (15) | 0.0082 (15) |
C10 | 0.0353 (17) | 0.0579 (19) | 0.069 (2) | −0.0005 (14) | 0.0072 (15) | 0.0005 (17) |
C11 | 0.056 (2) | 0.082 (3) | 0.070 (3) | 0.0115 (18) | −0.0030 (18) | 0.006 (2) |
C12 | 0.071 (3) | 0.073 (3) | 0.174 (5) | −0.030 (2) | −0.037 (3) | 0.016 (3) |
C13 | 0.0446 (19) | 0.074 (2) | 0.0501 (19) | 0.0021 (16) | 0.0076 (15) | −0.0172 (17) |
C14 | 0.057 (2) | 0.105 (3) | 0.056 (2) | −0.021 (2) | 0.0162 (18) | −0.013 (2) |
C15 | 0.0463 (18) | 0.0356 (16) | 0.0499 (19) | 0.0018 (13) | 0.0070 (15) | 0.0019 (14) |
Ni1—O1i | 2.0104 (18) | C5—C6 | 1.363 (4) |
Ni1—O1 | 2.0104 (18) | C5—H5 | 0.93 |
Ni1—N1 | 2.076 (2) | C6—H6 | 0.93 |
Ni1—N1i | 2.076 (2) | C7—H7 | 0.93 |
Ni1—N3i | 2.180 (3) | C8—C9 | 1.522 (4) |
Ni1—N3 | 2.180 (3) | C8—H8A | 0.97 |
O1—C2 | 1.313 (3) | C8—H8B | 0.97 |
O2—C3 | 1.383 (3) | C9—H9A | 0.97 |
O2—C13 | 1.416 (3) | C9—H9B | 0.97 |
S1—C15 | 1.639 (3) | C10—C11 | 1.508 (5) |
N1—C7 | 1.281 (3) | C10—C12 | 1.515 (5) |
N1—C8 | 1.471 (3) | C10—H10 | 0.98 |
N2—C9 | 1.486 (4) | C11—H11A | 0.96 |
N2—C10 | 1.499 (3) | C11—H11B | 0.96 |
N2—H2A | 0.90 | C11—H11C | 0.96 |
N2—H2B | 0.90 | C12—H12A | 0.96 |
N3—C15 | 1.153 (4) | C12—H12B | 0.96 |
C1—C6 | 1.400 (4) | C12—H12C | 0.96 |
C1—C2 | 1.414 (4) | C13—C14 | 1.500 (4) |
C1—C7 | 1.448 (4) | C13—H13A | 0.97 |
C2—C3 | 1.416 (4) | C13—H13B | 0.97 |
C3—C4 | 1.370 (4) | C14—H14A | 0.96 |
C4—C5 | 1.397 (4) | C14—H14B | 0.96 |
C4—H4 | 0.93 | C14—H14C | 0.96 |
O1i—Ni1—O1 | 180 | N1—C7—H7 | 116.3 |
O1i—Ni1—N1 | 91.56 (8) | C1—C7—H7 | 116.3 |
O1—Ni1—N1 | 88.44 (8) | N1—C8—C9 | 111.8 (2) |
O1i—Ni1—N1i | 88.44 (8) | N1—C8—H8A | 109.3 |
O1—Ni1—N1i | 91.56 (8) | C9—C8—H8A | 109.3 |
N1—Ni1—N1i | 180 | N1—C8—H8B | 109.3 |
O1i—Ni1—N3i | 91.65 (9) | C9—C8—H8B | 109.3 |
O1—Ni1—N3i | 88.35 (9) | H8A—C8—H8B | 107.9 |
N1—Ni1—N3i | 91.28 (9) | N2—C9—C8 | 110.9 (2) |
N1i—Ni1—N3i | 88.72 (9) | N2—C9—H9A | 109.5 |
O1i—Ni1—N3 | 88.35 (9) | C8—C9—H9A | 109.5 |
O1—Ni1—N3 | 91.65 (9) | N2—C9—H9B | 109.5 |
N1—Ni1—N3 | 88.72 (9) | C8—C9—H9B | 109.5 |
N1i—Ni1—N3 | 91.28 (9) | H9A—C9—H9B | 108.0 |
N3i—Ni1—N3 | 180 | N2—C10—C11 | 108.9 (2) |
C2—O1—Ni1 | 124.91 (16) | N2—C10—C12 | 110.4 (3) |
C3—O2—C13 | 117.0 (2) | C11—C10—C12 | 112.1 (3) |
C7—N1—C8 | 116.0 (2) | N2—C10—H10 | 108.4 |
C7—N1—Ni1 | 123.30 (19) | C11—C10—H10 | 108.4 |
C8—N1—Ni1 | 120.69 (17) | C12—C10—H10 | 108.4 |
C9—N2—C10 | 116.3 (2) | C10—C11—H11A | 109.5 |
C9—N2—H2A | 108.2 | C10—C11—H11B | 109.5 |
C10—N2—H2A | 108.2 | H11A—C11—H11B | 109.5 |
C9—N2—H2B | 108.2 | C10—C11—H11C | 109.5 |
C10—N2—H2B | 108.2 | H11A—C11—H11C | 109.5 |
H2A—N2—H2B | 107.4 | H11B—C11—H11C | 109.5 |
C15—N3—Ni1 | 171.7 (2) | C10—C12—H12A | 109.5 |
C6—C1—C2 | 119.8 (3) | C10—C12—H12B | 109.5 |
C6—C1—C7 | 117.4 (3) | H12A—C12—H12B | 109.5 |
C2—C1—C7 | 122.6 (2) | C10—C12—H12C | 109.5 |
O1—C2—C1 | 123.6 (2) | H12A—C12—H12C | 109.5 |
O1—C2—C3 | 119.0 (2) | H12B—C12—H12C | 109.5 |
C1—C2—C3 | 117.4 (2) | O2—C13—C14 | 109.0 (3) |
C4—C3—O2 | 124.9 (3) | O2—C13—H13A | 109.9 |
C4—C3—C2 | 121.4 (3) | C14—C13—H13A | 109.9 |
O2—C3—C2 | 113.7 (2) | O2—C13—H13B | 109.9 |
C3—C4—C5 | 120.2 (3) | C14—C13—H13B | 109.9 |
C3—C4—H4 | 119.9 | H13A—C13—H13B | 108.3 |
C5—C4—H4 | 119.9 | C13—C14—H14A | 109.5 |
C6—C5—C4 | 119.8 (3) | C13—C14—H14B | 109.5 |
C6—C5—H5 | 120.1 | H14A—C14—H14B | 109.5 |
C4—C5—H5 | 120.1 | C13—C14—H14C | 109.5 |
C5—C6—C1 | 121.2 (3) | H14A—C14—H14C | 109.5 |
C5—C6—H6 | 119.4 | H14B—C14—H14C | 109.5 |
C1—C6—H6 | 119.4 | N3—C15—S1 | 179.7 (3) |
N1—C7—C1 | 127.3 (3) |
Symmetry code: (i) −x+1/2, −y+1/2, −z. |
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···N3 | 0.90 | 2.34 | 3.113 (3) | 144 |
N2—H2A···O2i | 0.90 | 2.53 | 3.273 (3) | 141 |
N2—H2A···O1i | 0.90 | 1.79 | 2.584 (3) | 145 |
Symmetry code: (i) −x+1/2, −y+1/2, −z. |
Experimental details
Crystal data | |
Chemical formula | [Ni(NCS)2(C14H22N2O2)2] |
Mr | 675.54 |
Crystal system, space group | Monoclinic, C2/c |
Temperature (K) | 298 |
a, b, c (Å) | 24.958 (3), 14.016 (2), 9.613 (2) |
β (°) | 91.73 (2) |
V (Å3) | 3361.2 (9) |
Z | 4 |
Radiation type | Mo Kα |
µ (mm−1) | 0.74 |
Crystal size (mm) | 0.32 × 0.30 × 0.30 |
Data collection | |
Diffractometer | Bruker SMART CCD area-detector |
Absorption correction | Multi-scan (SADABS; Sheldrick, 1996) |
Tmin, Tmax | 0.797, 0.808 |
No. of measured, independent and observed [I > 2σ(I)] reflections | 9655, 3553, 2395 |
Rint | 0.046 |
(sin θ/λ)max (Å−1) | 0.635 |
Refinement | |
R[F2 > 2σ(F2)], wR(F2), S | 0.046, 0.115, 1.03 |
No. of reflections | 3553 |
No. of parameters | 199 |
H-atom treatment | H-atom parameters constrained |
Δρmax, Δρmin (e Å−3) | 0.56, −0.36 |
Computer programs: SMART (Bruker, 1998), SAINT (Bruker, 1998), SHELXS97 (Sheldrick, 2008), SHELXL97 (Sheldrick, 2008), SHELXTL (Sheldrick, 2008).
D—H···A | D—H | H···A | D···A | D—H···A |
N2—H2B···N3 | 0.90 | 2.34 | 3.113 (3) | 144 |
N2—H2A···O2i | 0.90 | 2.53 | 3.273 (3) | 141 |
N2—H2A···O1i | 0.90 | 1.79 | 2.584 (3) | 145 |
Symmetry code: (i) −x+1/2, −y+1/2, −z. |
Acknowledgements
This work was supported by the Natural Science Foundation of China (grant No. 30771696), the Natural Science Foundation of Zhejiang Province (grant No. Y407318) and the Science and Technology Plan of Huzhou (grant No. 2009GG06).
References
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As part of our investigations into novel urease inhibitors, we have synthesized the title compound, a new NiII complex. The Ni atom lies on an inversion centre; it is chelated by the phenolate O and imine N atoms from two Schiff base ligands, and is coordinated by the N atoms from two thiocyanate ligands (Fig. 1). While the three trans angles at Ni centre are 180° by symmetry, the other angles are close to 90°, ranging from 88.35 (9) to 91.65 (9)°, indicating a slightly distorted octahedral coordination. The Ni—O and Ni—N bond lengths (Table 1) are typical and are comparable with those observed in other similar nickel(II) complexes (Ali et al., 2004; Sarı et al., 2006; Gomes et al., 2000; Su et al., 2006) and the nickel(II) complex we reported previously (Wang, 2007). The amine N atoms of the Schiff base ligands are protonated and take no part in the coordination to the Ni atom.