Bis[benzyl 2-(heptan-4-ylidene)hydrazine-1-carboxylate]bis(thiocyanato)cobalt(II)

Palanivelu Nithya,Jim Simpson,Subbiah Govindarajan

doi:10.1107/s2414314619008125

Palanivelu Nithya, Jim Simpson + Show 1 more

Open Access

https://doi.org/10.1107/s2414314619008125

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Journal: IUCrData	Publication Date: Jun 11, 2019
Citations: 1	License type: CC BY 4.0

Affiliation: Bharathiar University, University of Otago

Abstract

The title compound, [Co(NCS)2(C15H22N2O2)2] or C32H44CoN6O4S2, was prepared from cobalt(II) nitrate, benzyl carbazate and ammonium thiocyanate in the presence of 4-heptanone. The compound crystallizes with two centrosymmetric complexes in which the cobalt(II) atoms have a trans-CoO2N4 octahedral coordination geometry. In the crystal, N—H...S, C—H...S and C—H....π contacts stack the complex molecules along the b-axis direction.

Highlights

The title compound, [Co(NCS)2(C15H22N2O2)2] or C32H44CoN6O4S2, was prepared from cobalt(II) nitrate, benzyl carbazate and ammonium thiocyanate in the presence of 4-heptanone
N—HÁ Á ÁS, C—HÁ Á ÁS and C— HÁ Á Á. contacts stack the complex molecules along the b-axis direction
In order to investigate and compare the coordinating ability of benzyl carbazate Schiff bases derived from higher homologues, we have prepared the title cobalt complex from benzyl carbazate with 4-heptanone with thiocyanate as the charge-balancing anionic ligand

Summary

Structure description

Our previous work involving Schiff-base complexes derived from benzyl carbazate and carbonyl compounds was limited to short-chain dialkyl ketones (Nithya et al, 2016, 2017). The title compound, Co(C15H22N2O2)2(NCS), crystallizes with two centrosymmetric, octahedral cobalt(II) complexes (1) and (2) in the monoclinic unit cell. These are differentiated in the numbering scheme by leading 1 and 2 characters, respectively (Fig. 1). With the exception of the di-n-propyl substituents on the C12 and C22 carbon atoms, the nonhydrogen atoms of the bidentate ligands lie close to the equatorial planes of both complexes with r.m.s. deviations from the best-fit plane through N11, N12, O11, C11, O12, C13Á Á ÁC19 of 0.079 Afor (1) and 0.094 Afor the corresponding plane in (2). N—HÁ Á ÁS and weaker C—HÁ Á ÁS hydrogen bonds combine with a C—HÁ Á Á contact between molecules (1) and (2), Table 1, to stack the complexes along the b-axis direction, Fig. 3

Synthesis and crystallization

DÁ Á ÁA

Absorption correction

Data collection

Special details