Half-sandwich Iridium, Rhodium, Sulfur And Nitrogen Carborane And Bidentate Carbene Compound Synthesis And Structural Study

One of the most important features of a carborane system is its ability to enter into substitution reactions at both the carbon and boron atoms without degradation of the carborane cage. On the one hand, the strong electron-withdrawing character of the o-carborane unit facilitates the metalation of the carborane C-H group. So it provides easy ways to prepare a wide range of C-substituted carborane derivatives, and it is interesting to study such derivatives. The main work of this thesis concentrated on the preparation and structure study of novel half-sandwich organometallic carborane complexes.The novel 1-SH-2-(RN=)C(NH(?)R)C2B10H10 ligand are readily accessible in a straight forward manner by insertion of carbodiimides ((RN=)2C) and sulfur into the Li-C bond of 1-Li-1,2-C2BioH11 by turn, and then undergo controlled hydrolysis. It is of great interest to design such ligand systems containing one functional group strongly bound to a transition metal center and another one coordinatively labile. Its reactions with [Cp*MCl2]2 (M=Ir, Rh) provide a series of products with B-H activation.Besides, we also study the reactivity differences and coordination preference of bi-N-heterocyclic carbenes (bi-NHCs) when react with defferent metal resources [(p-cymene)RuCl2]2 and [Cp*MCl2]2(M=Ir, Rh). It shows that metal resources and non-coordinated anion play an important role.