Hetero-ansa-metallocenes: I. Synthesis of the novel [1]-borylidene-bridged ansa-zirconecene dichloride
摘要:
The first ansa-[1]-zirconocene dichloride with the boron bridge atom, [(mu-PhB)(eta(5)-C5H4)(2)]ZrCl2 (5) is synthesised via subsequent transmetallation of C5H4(SnMe(3))(2) by PhBCl(2) and ZrCl4. The unstable corresponding ligand - PhB(C5H5)(2) (1) - was synthesised and isolated in the form of pyridine (1:1) (2) and DABCO (2:1) (3) adducts.