摘要 : Complexes [XAl{CH2CR=NNMe2}(2)] {X = Cl and R = Me or iPr, X = Me and R = Me, and X = N(NMe2)[CR=CH2] and R = Me or iPr} were synthesized by salt metathesis reactions involving lithium salts of hydrazones, Li[CH2CR=NNMe2]. X-ray c... 展开 Complexes [XAl{CH2CR=NNMe2}(2)] {X = Cl and R = Me or iPr, X = Me and R = Me, and X = N(NMe2)[CR=CH2] and R = Me or iPr} were synthesized by salt metathesis reactions involving lithium salts of hydrazones, Li[CH2CR=NNMe2]. X-ray crystallographic studies showed that all the complexes contain two chelating hydrazonido ligands bonding to aluminum through the methylene carbon and amine nitrogen (-NMe2). For the complexes in which X = N(NMe2)[CR=CH2] (R = Me or iPr), the N(NMe2)[CR=CH2] ligand represents a linkage isomer in which the hydrazonido ligand bonds through nitrogen rather than through carbon, thereby becoming a hydrazido ligand. In the single crystal containing [Al{CH(2)CiPr=NNMe2}(2)](N(NMe2)(CiPr=CH2)}], its isomer [Al{CH(2)CiPr=NNMe2}(3)], having two chelating hydrazonido and one monodentate hydrazonido ligands, is present 45 % of the time. In solution, the [Al{CH2CR=NNMe2}(2)(N(NMe2)-(CR=CH2)}] (R = Me or iPr) complexes are in equilibrium with [Al{CH2CR=NNMe2}(3)]. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008) 收起