NMR Studies on Halogeno-cis-bis(phosphine)-nido-pentaboranyl Derivatives of Nickel, Palladium, and Platinum

Abstract

Abstract An examination of the 1H-{11B}, 11B, 11B-{1H}, and 31P-{1H} NMR behaviour of the compounds [M(B5H8)(X)(dppe)] has been made [M = Ni, Pd and Pt; X = halogen; dppe = bis(diphenylphosphino)ethane]. Some relaxation phenomena are rationalised, and it is concluded that all the compounds examined have a static metallo -nido-penta -borane structure in which the metal atom occupies a bridging position between two basal boron atoms. Some temperature and solvent effects are also presented and briefly discussed.