Synthesis, characterization and a theoretical investigation of the formation of silicon, germanium and tin azapentadiene compounds from lithium azapentadienyls
Ge, Sn). The reactions of the preferential EE isomers 1′–3′ with the electrophiles generally give the addition at the terminal (C5) carbon of the azapentadienyl moiety, affording the corresponding complexes t-BuNCHCHCHCH2EMe3 [E=Si (6), Ge (7), Sn (8)]; t-BuNCHC(Me)CHCH2EMe3 [E=Si (9), Ge (10), Sn (11)] and the corresponding EE and ZE isomers: t-BuNCHCHC(Me)CH2EMe3 [ESi (12), (12′);