Synthesis and spectroscopic characterisation of a new class of heterobimetallic zirconocene(IV) compounds

Reactions of Cp2ZrCl2 with homometallic complexes of aluminium containing one residual hydroxy group Al(OGO)(OGOH) and Al(L)(OGOH) [where G = G(1) = CMe2CMe2 (1a); G = G(2) = CMe2CH2CHMe (1b); G = G(3) = CMe2CH2CH2CMe2 (1c) and L = L-1 = OC6H4CH=NCH2CH2O, G = G(1) (2a); L = L-1, G = G(2) (2b); L = L-1, G = G(3) (2c); L = L-2 = OC10H6CH=NCH2CH2O, G = G(1) (2d); L = L-2, G = G(2) (2e); L = L-2, G = G(3) (2f)] in THF using Et3N as HCl acceptor affords novel heterobimetallic compounds of the types Al(OGO)(2)Zr(Cl)Cp-2 and Al(L)(OGO)Zr(Cl)Cp-2, respectively. All of these derivatives have been characterised by elemental analyses, molecular weight measurements, and spectroscopic [IR, NMR (H-1 and Al-27)] studies.