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

Abstract

Reactions of Cp₂ZrCl₂ with homometallic complexes of aluminium containing one residual hydroxy group Al(OGO)(OGOH) and Al(L)(OGOH) [where G=G¹=CMe₂CMe₂(1a); G=G²=CMe₂CH₂CHMe (1b); G= G³=CMe₂CH₂CH₂CMe₂(1c) and L=L¹=OC₆H₄CH=NCH₂CH₂O, G=G¹(2a); L=L¹, G=G²(2b); L=L¹, G=G³(2c); L=L²=OC₁₀H₆ CH=NCH₂CH₂O, G=G¹(2d); L=L², G=G²(2e); L=L², G=G³(2f)] in THF using Et₃N as HCl acceptor affords novel heterobimetallic compounds of the types Al(OGO)₂Zr(Cl)Cp₂ and Al(L)(OGO)Zr(Cl)Cp₂, respectively. All of these derivatives have been characterised by elemental analyses, molecular weight measurements, and spectroscopic [IR, NMR (¹H and ²⁷Al)] studies.