Topological investigations of the state of some transition-metal ions in some binary mixtures of non-electrolytes: molar excess volumes
Abstract
Molar excess volumes have been measured at 308.15 K for binary mixtures of pyridine (A) saturated with anhydrous CoCl2(S), denoted A(S), with aniline, o-toluidine, formamide or N,N-dimethylformamide, denoted (B), and the results have been rationalized to suggest that the saturation of pyridine with anhydrous CoCl2 converts the octahedrally coordinated Co2+(in anhydrous CoCl2) into tetrahedrally coordinated Co2+ in such neutral entities as Cl2Co(Py)2; and that the addition of B to A(S) results in the formation of molecular entities of the type Cl2Co(Py)B. These conclusions have been supported by infrared- and molar mass-spectroscopic studies.