Formation of geometrical isomers during protonation of carbonyl complexes of transition metals: (η 5-C 5H 5)Mn(CO)(Ph 2PCH 2CH 2PPh 2)

Abstract

IR spectroscopic studies have been carried out to elucidate the factors responsible for formation of cis and trans isomers during protonation of (ν 5-C 5H 5)Mn(CO)- Ph 2P(CH 2) 2PPh 2. The experimental results indicate that the conversion of the more rapidly formed cis isomer into the thermodynamically more advantageous trans isomer involves an intermolecular rather than intramolecular mechanism.