Rhodium complexes containing arylspiroborates derived from 3,5-di-tert-butylcatechol and their use in catalyzed hydroborations
作者:Michael J. Geier、Stephen J. Geier、Nathan R. Halcovitch、Christopher M. Vogels、Andreas Decken、Stephen A. Westcott
DOI:10.1016/j.poly.2012.06.048
日期:2013.3
cationic species of the type [(P2)Rh(NCCH 3)2][Bbutcat2] (6-9) were formed when reactions were carried out in acetonitrile, where preferential binding of the solvent was observed over the bulky arylspiroborate ligand. The zwitterionic species Rh(η6-butcatBbutcat)(P2), 11 and 12, could be generated via a different route, by addition of B2butcat3 to Rh(acac)(P2), but only for the sterically-constrained
Tl(acac)与B2butcat3(butcat = 3,5-二叔丁基邻苯二酚)定量反应生成butcatB(acac)和Tl(Bbutcat 2)(1),后者可溶于常见的有机溶剂,例如THF和二氯甲烷。在THF中将1加到[RhCl(coe)2] 2(coe =顺式环辛烯)和二膦的混合物中,得到bridge桥接的双核配合物[(P2)Rh(μ-Cl)2(μ-Tl)Rh( [P2)] [Bbutcat2](2-5,P2为dppm = 1,1'-双(二苯基膦基)甲烷,dppe = 1,2-双(二苯基膦基)乙烷,dppp = 1,3-双(二苯基膦基)丙烷和dppb = 1,4-双(二苯基膦基)丁烷)是唯一的新型含铑物种。在某些情况下,由于与膦配体的苯环发生二次相互作用,the原子的结合不对称。当在乙腈中进行反应时,会形成[(P2)Rh(NCCH 3)2] [Bbutcat2](6-9)类型的单核阳