Azomethine derivatives. Part II. Reactions between diphenylketimine and trimethylaluminium, triethylaluminium, and triphenylaluminium

Abstract

Diphenylketimine and trimethylaluminium form a crystalline adduct Ph₂C:NH,AlMe₃ which at 100° loses methane to form the azomethine derivative (Ph₂C:N·AlMe₂)₂. In the systems Ph₂C:NH–AIR₃(R = Et or Ph), the 1 : 1 mixtures of the components are viscous liquids of which the infrared and proton magnetic resonance spectra provide evidence of weak complex formation. Both systems lose RH readily at 20–60° to form azomethine derivatives (Ph₂C:N·AIR₂)₂. Features of the infrared, proton magnetic resonance, and mass spectra of the azomethine derivatives are discussed.