The Synthesis, Reaction and Crystal Structures of Ethyltetramethylcyclopentadienylruthenium Compounds  

作　　者：来鲁华 张泽莹 邵美成 

机构地区：[1]Department of Chemistry, Peking University, Beijing 100871, PRC

出　　处：《Science China Chemistry》1993年第10期1167-1176,共10页中国科学（化学英文版）

基　　金：Project supported by the National Natural Science Foundation of China.

摘　　要：Pentamethylcyclopentadienyl-trimethylphosphine-metal compounds play an important role in the activation studies of saturated hydrocarbons. A method to synthesize ethyltetramethylruthenium compounds was established, which started from the reaction of RuCl_3. H_2O with ethyltetramethylcyclopentadiene to give a dimer compound of 2. When 2 was reacted with different amounts of trimethylphosphine, compounds 3 [C_5Me_4EtRu(PMe_3)Cl_2] and 4 [(C_5Me_4Et)Ru(PMe_3)_2Cl] were obtained. Compound 3 is a 17-electron species which is in formula similar to Bergman's Ir compound used in hydrocarbon activation reaction, but might be more reactive because of its unsaturated electron structure. The crystal structure analysis of compounds 2, 3 and 4, showed that the ruthenium atom was coordinated in a 'threeleg-piano-stool' geometry in all the three compounds. The Ru—Cl bond in 3 and 4 was lengthened, making it labile to other substitution reactions.Pentamethylcyclopentadienyl-trimethylphosphine-metal compounds play an important role in the activation studies of saturated hydrocarbons. A method to synthesize ethyltetramethylruthenium compounds was established, which started from the reaction of RuCl₃. H₂O with ethyltetramethylcyclopentadiene to give a dimer compound of 2. When 2 was reacted with different amounts of trimethylphosphine, compounds 3 [C₅Me₄EtRu（PMe₃）Cl₂] and 4 [（C₅Me₄Et）Ru（PMe₃）₂Cl] were obtained. Compound 3 is a 17-electron species which is in formula similar to Bergman’s Ir compound used in hydrocarbon activation reaction, but might be more reactive because of its unsaturated electron structure. The crystal structure analysis of compounds 2, 3 and 4, showed that the ruthenium atom was coordinated in a "threeleg-piano-stool" geometry in all the three compounds. The Ru—Cl bond in 3 and 4 was lengthened, making it labile to other substitution reactions.

关 键 词：SYNTHESIS of ethyltetramethyleyelopentadienylruthenium COMPOUNDS crystal structures of ethyltetramethylcyclopentadienylruthenium COMPOUNDS carbonhydrogen BOND aetivation. 

分 类 号：O6[理学—化学]