Nitriles react with 2,3-dimethyl-1,1-bis(cyclopentadienyl)ti to afford either azatitanacyclohexadienes or diazatitanacyclooctatrienes. The latter appear to be formed via the intermediacy of butadienylimido complexes, which can be intercepted by the addition of trimethylphosphine. Bis(cyclopentadienyl)titanium bis(trimethylphosphine) undergoes ligand substitution reactions with nitriles. Loss of trimethylphosphine from the 2,4,6-trimethylbenzonitrile complex appears to lead to reductive coupling of the nitrile, affording a dimeric imido complex.