Transition-metal quinoxaline complexes. Part IV. Cobalt(II) derivatives

Abstract

A series of complexes of cobalt(II) with quinoxaline (Q), 2-methylquinoxaline (Mq), and 2,3-dimethylquinoxaline (Dmq) is described. Spectral and magnetic data are used to assign polymeric octahedral structures to the complexes QCoCl₂, MqCoCl₂, and Mq₃Co₂Cl₄ and tetrahedral structures to complexes of the type Q₂CoX₂ and DmqCoX₂(where X = Cl, Br, or l) together with QCoBr₂ and MqCoBr₂. The absorption bands are assigned and values of Dq and B′ calculated.