199396-47-9Relevant academic research and scientific papers
Synthesis and reactivity of labile MeCN adducts of diruthenium bis(μ-methylene) species, Cp2Ru2(μ-CH2)2(CO) n(MeCN)2-n (n = 1, 2): Reaction with H sources, H-X (X = SiR3, SnR3, H), and C-C coupling with alkynes and diazoalkanes
Akita, Munetaka,Hua, Ruimao,Nakanishi, Sadahiro,Tanaka, Masako,Moro-Oka, Yoshihiko
, p. 5572 - 5584 (1997)
Irradiation of the diruthenium bis(μ-methylene) complex Cp2Ru2(μ-CH2)2(CO)2 (1), in acetonitrile gives the mono- and bis(acetonitrile) species Cp2Ru2(μ-CH2)2(CO)(MeCN) (2) and Cp2Ru2(μ-CH2)2(MeCN)2 (3) in a successive manner. The mono-MeCN species 2 has been characterized spectroscopically and crystallographically, but the bis-MeCN species 3 is too unstable to be fully characterized. Reaction of 2 with hydrosilanes and hydrostannanes results in oxidative addition of the H-Si and H-Sn bond to give hydrido-μ-methylene complexes, Cp2Ru2(μ-CH2)2(H)(mR 3)(CO) (m = Si (7), Sn (9)). In the case of the reactions with dihydrosilane, phenylsilane, and triphenylstannane, one of the two methylene bridges is eliminated as methane (and benzene from phenylsilane) to give μ-methylene-μ-silylene complexes, Cp2Ru2(μ-CH2)(μ-SiR 2)(H)(SiR3)(CO) (8), and a tristannyl-μ-methylene complex, Cp2Ru2(μ-CH2)(μ-H)(SnPh3) 3(CO) (10). Treatment of 2 with alkynes (R1C≡CR2) and diphenyldiazomethane produces the metallacyclic products Cp2Ru2[μ-η3-C(R1)C(R 2)=CH2](μ-CH2)(CO) (12), and the vinylidene complex Cp2Ru2(μ-C=CPh2)(μ-η 3-CPh2) (14), respectively, via C-C coupling. In contrast to 2, corresponding reactions of the bis-MeCN species 3 are sluggish and only the simple MeCN replacement reaction proceeds in a selective manner.
