The Rh(III) species Rh(PCy3)2H2Cl is an effective catalyst (2 mol %, 298 K) for the dehydrogenation of H3B·NMe2H (0.072 M in 1,2-F2C6H4 solvent) to ultimately afford the dimeric aminoborane [H2BNMe2]2. Mechanistic studies on the early stages in the consumption of H3B·NMe2H, using initial rate and H/D exchange experiments, indicate possible dehydrogenation mechanisms that invoke turnover-limiting N–H
Rh(III)物种Rh(PCy 3)2 H 2 Cl是H 3 B·NMe 2 H(在1,2-F 2 C 6中为0.072 M )脱氢的有效催化剂(2 mol%,298 K)H 4溶剂),最终得到二聚
氨基
硼烷[H 2 BNMe 2 ] 2。使用初始速率和H / D交换实验,对H 3 B·NMe 2 H消耗的早期阶段进行的机理研究表明,可能存在脱氢机制,该机制可能引起B–H之前或之后的营业额限制NH活化活化,以形成ħ 2 B═NMe2,然后二聚得到[H 2 BNMe 2 ] 2。另一个细节是活性催化剂Rh(PCy 3)2 H 2 Cl与非活性二聚体[Rh(PCy 3)H 2 Cl] 2快速平衡。Rh(PCy 3)2 H 2 Cl与[Rh(PCy 3)H 2(H 2)2 ] [BAr F 4 ]的反应形成卤化物桥联的加合物[Rh(PCy 3)2 H 2(μ-
氯已经在晶体学上表征的2(PCy 3)2