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Cationic (η5-C5Me4R)RhIII Complexes with Metalated Aryl Phosphines Featuring η4-Phosphorus plus Pseudo-Allylic Coordination
Organometallics ( IF 2.5 ) Pub Date : 2017-12-20 00:00:00 , DOI: 10.1021/acs.organomet.7b00688
María F. Espada , Ana C. Esqueda 1 , Jesús Campos , Miguel Rubio , Joaquín López-Serrano , Eleuterio Álvarez , Celia Maya , Ernesto Carmona
Affiliation  

In this contribution we study experimentally and computationally some electrophilic cationic (η5-C5Me4R)RhIII complexes containing a cyclometalated bis(aryl) phosphine, PR′Ar2. The phosphine Ar groups feature methyl substituents at the 2- and 6-positions of the aromatic rings, allowing the formation of the complexes [(η5-C5Me4R)Rh(CP)]+ (3+), where the metalated phosphine exhibits η4 coordination to rhodium through phosphorus and the carbon atoms of the adjoining pseudo-allylic functionality. The solution and solid-state structures of complexes 3+ have been studied by NMR and X-ray methods and their electronic properties investigated with the aid of DFT calculations. The Lewis acid behavior of complexes 3+ has also been addressed, concentrating on reactivity toward CO, H2 ,and hydrosilanes. Some catalytic Si–H/Si–D exchange and hydrosilylation reactions are also reported.

中文翻译:

阳离子的(η 5 -C 54 R)的Rh III配合物的金属化的芳基膦设有η 4 -磷加伪烯丙基协调

在这方面的贡献,我们通过实验研究和计算一些亲电子的阳离子(η 5 -C 54 R)的Rh III含有环金属化配合物的双(芳基)膦,PR'Ar 2。膦Ar基团设有在2-和芳族环的6-位甲基取代基,从而允许复合物的形成[(η 5 -C 54 R)的Rh(C P)] +3 +),其中金属化膦展品η 4通过磷和相邻的假烯丙基官能团的碳原子与铑配位。通过NMR和X射线方法研究了配合物3 +的溶液和固态结构,并借助DFT计算研究了它们的电子性质。还研究了配合物3 +的路易斯酸行为,重点是对CO,H 2和氢硅烷的反应性。还报道了一些催化的Si-H / Si-D交换和氢化硅烷化反应。
更新日期:2017-12-21
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