Synthesis, characterisation, and molecular structures of new ferrocenyl Schiff bases and their aluminium and zinc complexes

摘要

The aldimines FcCH=NCH(Me)CH2OMe (1), FcCH=NCH2H6H4-2-OMe (2) and FcCH=N(CH2)(3)NHMe (3) were obtained by reacting ferrocene aldehyde with the corresponding primary amines. Compounds 1-3 react with Me2Zn and Me3Al in a molar ratio 1: 1 to the corresponding adducts 4-8. Reactions of 1 and 2 with t-butyllithium lead to an addition of the lithium reagent yielding the corresponding amides 9 and 10. Compounds 1-10 were characterised by H-1- and C-13-NMR spectroscopy. The molecular structures of 1, 2, 4, 5, 9 and 10 were determined by X-ray diffraction. 4 consists of monomeric molecules, containing a four-coordinated Zn atom as a result of Zn-0 and Zn-N interactions. In contrast to 4 the Al atom in 5 is coordinated by the N atom of the ligand only. 9 and 10 form dimeric molecules with four-co ordinated Li atoms as the general structural feature. [References: 33]