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刊用FT-IR和UV技术跟踪反应进程,研究了在Me_3NO存在下Ir_4(CO)_(12)和Ir_4(CO)_(11)PPh_3分别在CHCl_3—C_2H_5OH和CHCl_3溶剂中取代羰基反应的动力学与机理。结果表明反应遵循二级速率定律:r=k_2[Me_3NO][配合物]。该速率方程与缔合机理相一致。将Ir_4(CO)_(11)L和Os_3(CO)_(11)L(L=CO,PPh_3)体系的动力学结果相比较,着重讨论了桥基因素对反应活性的影响。
The reaction kinetics of Ir_4 (CO) _ (12) and Ir_4 (CO) _ (11) PPh_3 reacted with carbonyl in CHCl_3-C_2H_5OH and CHCl_3 solvents respectively in the presence of Me_3NO was studied by FT-IR and UV techniques. Learn and mechanism. The results showed that the reaction followed the second-order rate law: r = k_2 [Me_3NO] [complex]. The rate equation is consistent with the association mechanism. The kinetics of Ir_4 (CO) _ (11) L and Os_3 (CO) _ (11) L (L = CO, PPh_3) systems were compared.