215442-71-0Relevant academic research and scientific papers
Reactions of (Me3ECH2)3ZrSi(SiMe3)3 (E = C, Si) with 2,6-dimethylphenyl isocyanide. Preferential isocyanide insertion into Zr-silyl bonds
Wu, Zhongzhi,McAlexander, Lenore H.,Diminnie, Jonathan B.,Xue, Ziling
, p. 4853 - 4860 (1998)
The reactions of alkyl silyl complexes (Me3ECH2)3ZrSi(SiMe3)3 [E = C (1), Si (2)] with 2,6-dimethylphenyl isocyanide (ArNC) have been investigated. The first ArNC was found to insert exclusively into the Zr-Si bond, and the second and third ArNC into the Zr-C bonds in 1 and 2. 1 and 2 react with up to 3 equiv of ArNC to give (Me3ECH2)3Zr{η2-C[Si-(SiMe 3)3]=NAr} [E = C (3), Si (4)], (Me3ECH2)2Zr[η2-C(CH 2EMe3)=NAr]{η2-C[Si(SiMe3) 3]=NAr} [E = C (5), Si (6)], and (Me3ECH2Zr[η2-C(CH2EMe 3)=NAr]2{η2-C[Si(SiMe3) 3]=NAr} [E = C (7), Si (8)]. The tri-insertion complexes 7 and 8 are inert to excess ArNC. The structures of 3 and 7 have been determined by X-ray crystallography. In the structure of 3, the α-hydrogen atoms on one neopentyl ligand lie in close contact (av 2.41 A?) with the metal center giving rise to Zr-C-Hα bond angles of 90 and 92°. The crystal structure of the precursor 1 has also been determined.
