Ka. Rufanov et al., HETERO-ANSA-METALLOCENES .1. SYNTHESIS OF THE NOVEL [1]-BORYLIDENE-BRIDGED ANSA-ZIRCONOCENE DICHLORIDE, Journal of organometallic chemistry, 525(1-2), 1996, pp. 287-289
The first ansa-[1]-zirconocene dichloride with the boron bridge atom,
[(mu-PhB)(eta(5)-C5H4)(2)]ZrCl2 (5) is synthesised via subsequent tran
smetallation of C5H4(SnMe(3))(2) by PhBCl(2) and ZrCl4. The unstable c
orresponding ligand - PhB(C5H5)(2) (1) - was synthesised and isolated
in the form of pyridine (1:1) (2) and DABCO (2:1) (3) adducts.