An exception to the general mechanism of CO insertion into the alkyl–manganese bond
Abstract
Two-electron donor ligands L enter trans(and not cis as in other manganese examples) to the acyl group in the reaction of fac-[Mn(CO)3(bipy)(Me)]1 with L to give cis,trans-[Mn(CO)2(L)(bipy)(COMe)]2; the reaction of 1 with *CO (CO 99% enriched in 13C) gives cis,trans-[Mn(CO)2(*CO)(bipy)(COMe)]4, ruling out the formation of the possible intermediate cis,cis-[Mn(CO)2(L)(bipy)(COMe)]3.