Zincocenes as Mild Cyclopentadienyl Transfer Reagents toward Rhodium(I) Olefin Precursors. Facile Synthesis of (η<sup>5</sup>-Cp′)Rh(olefin)<sub>2</sub> Compounds
The Rh(I) cyclopentadienyl olefin compounds [(η5-C5Me4R)Rh(olefin)2] (R = CMe3, SiMe3, SiMe2CMe3; olefin = C2H4, C2H3SiMe3) are readily prepared from the corresponding [RhCl(olefin)2]2 and zincocene, [Zn(C5Me4R)2], precursors. The new compounds undergo hydrogen/deuterium exchange at the olefinic sites in deuterated benzene, at a rate dependent on the cyclopentadienyl substituents.
上的Rh(I)的环戊二烯基的烯烃化合物[(η 5 -C 5我4 R)的Rh(烯烃)2 ](R = CME 3,森达3,森达2 CME 3 ;烯烃= C 2 H ^ 4,C 2 H ^ 3 SiMe 3)可以轻松地由相应的[RhCl(烯烃)2 ] 2和氧化锌,[Zn(C 5 Me 4 R)2],前体。新化合物在氘代苯中的烯烃位置进行氢/氘交换,其速率取决于环戊二烯基取代基。