spectrophotometry. The substitution reaction occurs by a mechanism involving rate-limiting dissociation of bromo ligands to form the unsaturated intermediates [FeBr(depe) 2 ] + ( k 1 = 1.52 ± 0.02 s −1 ) and [Fe(NCR)(depe) 2 ] 2+ ( k 3 = 0.063 ± 0.008 s −1 ) which add the nitrile ligand to form those nitrile complexes. The competition between the nitrile and Br − for such metal centres has also been investigated
摘要在有机腈NCCH2 C 6 H 4 OMe-4上,反式-[FeBr 2(depe)2](depe = Et 2 PCH 2 CH 2 PEt 2)的
溴化物
配体在体内的置换反应动力学。
四氢呋喃(在不存在或存在Br-的情况下),得到相应的单-和二腈配合物反式-[FeBr(NCCH 2 C 6 H 4 OMe-4)(depe)2] +和反式-[ Fe(NCCH 2 C 6 H 4 OMe-4)2(depe)2] 2+,已通过阻流分光光度法进行了研究。取代反应是通过涉及限速解离
溴配体以形成不饱和中间体[FeBr(depe)2] +(k 1 = 1.52±0.02 s -1)和[Fe(NCR)(depe)2]的机理发生的。 2+(k 3 = 0.063±0.008 s -1),其添加腈
配体以形成那些腈络合物。还研究了腈与Br-之间对于此类
金属中心的竞争,并且观察到添加的Br-对第二
溴配体相对于