trans-Bis(isothiocyanato)bis(ethylenediamine)cobalt(III) Thiocyanate

Two independent cations are present in the asymmetric unit of [Co(NCS) 2 (C 2 H 8 N 2 ) 2 ]SCN, one lying on an inversion center and the other on a twofold axis that bisects each ethylenediamine ligand. The centrosymmetric cation has Co-N(ethylenediamine) bond lengths of 1.953 (1) and 1.954 (1)A, and a Co-NCS bond length of 1.901(1)A. The twofold cation has Co-N(ethylenediamine) bond lengths 1.945 (1) and 1.947 (1) A, and a Co-NCS length of 1.896(1). In both cases, the isothiocyanato ligands coordinate slightly non-linearly, forming an angle of 175.9(1)° in the centrosymmetric case and 163.8 (1)° in the twofold symmetric case.