The reactivity of trimethylsilyliminophosphines towards titanium and zirconium halides
作者:Mark J. Sarsfield、Musa Said、Mark Thornton-Pett、Lee A. Gerrard、Manfred Bochmann
DOI:10.1039/b009082o
日期:——
Zirconium tetrachloride reacted with C2H4(Ph2PNSiMe3)2-1,2 1 under C–H activation to give the NCN chelate complex ZrCl3κ3-N,C,N′-C2H3(Ph2PNSiMe3)2}, while the reaction with C5H3N(Ph2PNSiMe3)2-2,6 gave an N-donor adduct. Cp*TiCl3 reacts with trimethylsilyliminophosphines under dehalosilylation in all cases. In contrast to 1, the potentially C–N chelating benzylphosphinimine (4-ButC6H4CH2)Ph2PNSiMe3 undergoes dehalosilylation with TiCl4 in preference to C–H activation, while prolonged reflux with ZrCl4 affords the salt [4-ButC6H4CH2P(Ph)2NHSiMe3]2[Zr2Cl10]. The molecular structures of the latter, ZrCl3C2H3(Ph2PNSiMe3)2}, C5H3N(Ph2PNTiCl2Cp*)2-2,6, and TiCl2Cp*NPPh2CH2C6H4But-4} have been determined by X-ray diffraction.
四氯化锆与C2H4(Ph2PNSiMe3)2-1,2 1在C-H活化下反应,生成NCN螯合物ZrCl3κ3-N,C,N′-C2H3(Ph2PNSiMe3)2},而与C5H3N(Ph2PNSiMe3)2-2,6反应则生成N-供体加合物。在所有情况下,Cp*TiCl3与三甲基硅亚氨基膦反应,发生脱卤硅化。与1相反,潜在的C-N螯合苄基膦亚胺(4-ButC6H4CH2)Ph2PNSiMe3与TiCl4发生脱卤硅化,而不是C-H活化,而与ZrCl4长时间回流则