The reaction of [CpTh(3,3-diphenylcyclopropenyl)] (Cp = η-CH) with 1 equiv of lithium diisopropylamide (LDA) results in cyclopropenyl ring opening and formation of the thorium allenylidene complex, [Li(EtO)][CpTh(CCCPh)] ([Li(EtO)][]), in good yield. Additionally, deprotonation of [CpTh(3,3-diphenylcyclopropenyl)] with 1 equiv of LDA, in the presence of 12-crown-4 or 2.2.
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