Metal stabilized carbanions. Kinetic acidity and 1H n.m.r. spectrum of the π-(tricarbonylchromium)-5H-dibenzo[a,d]cycloheptenyl anion
Abstract
The rate of formation and the 1H n.m.r. spectrum of the 5H-dibenzo [a,d]cyclotheptenyl anion complexed with tricarbonylchromium are reported and the variations with respect to the unco-ordinated anion are discussed.