The crystal structure of Bis(benzothiazole-2-thiolato)bis(pyridine)cobalt(II)

Abstract

Crystalline bis(benzothiazole-2-thiolato)bis(pyridine)cobalt(II) [Co(mbt)2(py)2] contains molecular complexes with C₂ point symmetry, in which the cobalt is coordinated by two thiazole nitrogen atoms[cis, Co- N = 2.158(4) Ǻ], two mbt^- exocyclic sulphur (S_e) atoms [trans, Co-S = 2.595(5) Ǻ],and two pyridine nitrogen atoms [cis, Co-N = 2.120(4) Ǻ]. The N-C-S, section of mbt^- is loosely coordinated to cobalt, forming a four-membered chelate ring. It is inferred from the observed dimensions that the electronic structure of coordinated mbt^- is ?allylic?, N=C=S_e. The crystals are orthorhombic, a 16.165(1), b 16.302(1), c 18.533(1) , Ǻ, space group Pccn, Z 8 [2 x 1/2 x Co(mbt)₂(py)₂],p_obs 1.495, p_calc 1.495 g cm^-3: Ni(mbt)₂(py)₂ is isostructural. The structure was obtained from 1847 observed diffractometer data (Cu Kα, θ_max 55°), and refined to R 0.035, R_w 0.031.