Isomerism of metal complexes with the boron cluster anions B10H 10 2- and B12H 12 2-

A new type of inner-sphere isomerism in coordination chemistry observed in metal complexes with boron cluster anions B (n) H (n) (2-) (n = 10, 12) is discussed. Specific structure of the closo-borohydride anions gives rise to edge and facial isomers, among which mirror isomers have been found. Examples of edge and facial isomers of metal complexes with the B10H (10) (2-) and B12H (12) (2-) , anions obtained experimentally and studied by X-ray diffraction are considered. Analysis of their structure revealed a new type of isomerism, which was called positional..