Novel Complexes [M(DMF)6][Mo6Br8(NCS)6] (M = Mn2+, Co2+, Ni2+, Cu2+, and Cd2+): Synthesis,Structure Determination,and Properties

A series of novel complexes [M(DMF)₆][Mo₆Br₈(NCS)₆] (M = Mn²⁺, Co²⁺, Ni²⁺, Cu²⁺, and Cd²⁺) was synthesized. Compounds with M = Co and Mn were examined using X-ray diffraction analysis and found to be isostructural. A cobalt-containing complex was used to illustrate their essential structural features. The NCS ligands are coordinated through the nitrogen atom. The IR spectra of all the compounds obtained correlate well with the X-ray diffraction data. When heated, the complexes release all of their DMF molecules to give MMo₆Br₈(NCS)₆ salts (TGA data). The magnetic properties of the compounds indicate a weak interaction between the paramagnetic cations.