Structures of cis- and trans-bis(ethylenediamine)(isothiocyanato)(thiosulfato)cobalt(III)

Diaquatetrakis(dimethyl sulfoxide-κO)cobalt(II) bis[diamminetetrakis(thiocyanato-κN)chromate(III)] dimethyl sulfoxide hexasolvate dihydrate

The solvated title salt, [Co(C2H6OS)4(H2O)2][Cr(NCS)4(NH3)2]·6C2H6OS·2H2O, is build up from a complex [Co(DMSO)4(H2O)2]2+ cation (where DMSO is dimethyl sulfoxide), two Reinecke's Salt anions, i.e. [Cr(NCS)4(NH3)2]−, as the complex counter-ions, together with solvent molecules (six DMSO and two water). The crystal packing consists of a branched three-dimensional system of hydrogen bonds involving the DMSO and water solvent molecules, the S atoms of the thiocyanate ligands, and the coordinating NH3 and H2O molecules.

trans-Chloridobis(ethane-1,2-diamine-κ2N,N′)(thiocyanato-κN)cobalt(III) diamminetetrakis(thiocyanato-κN)cromate(III)

The title ionic complex [CoCl(NCS)(C₂H₈N₂)₂][Cr(NCS)₄(NH₃)₂], which crystallizes as a non-merohedral twin, is build up of a complex cation [CoCl(NCS)(en)₂]⁺ (en is ethane-1,2-di­amine) and the Reinecke’s salt anion [Cr(NCS)₄(NH₃)₂]⁻ as complex counter-ion. A network of N—H⋯S and N—H⋯Cl hydrogen bonds, as well as short S⋯S contacts [3.538 (2) and 3.489 (3) Å], between the NCS groups of the complex anions link the mol­ecules into a three-dimentional supra­molecular network. Intensity statistic indicated twinning by non-mero­hedry with refined weighs of twin components are 0.5662:0.4338.