Fusing Nickelocene and Cyclopentadiene by Two Silyl Bridges . Synthesis and * H , 13 C , and 29 Si NMR Investigation of a Paramagnetic Building Block for High-Nuclear Metallocenes

Abstract

Two isomers of tetrahydro-4,4,8,8-tetramethyl-4,8-disila-s-indacene (LH2) were monodeprotonated and treated with cyclopentadienyl anion and NiBr2(THF)i 5 to give a 72% yield of the mixed nickelocene CpNi(LH) where a cyclopentadiene is fused to a nickelocene. The analysis of the paramagnetic 'H, 13C, and 29Si NMR spectra demonstrated that the syn and anti… (More)

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