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Reversible Transformation of a μ3-η3-C3 Ring into μ3-η2-Ethyne and μ-Vinylidene Ligands at a Triruthenium Site upon Deprotonation and Protonation
Organometallics ( IF 2.5 ) Pub Date : 2020-11-25 , DOI: 10.1021/acs.organomet.0c00670
Toshiro Takao 1 , Koichi Seki 1
Affiliation  

A μ-vinylidene-μ32-ethyne complex, [(Cp*Ru)33-CH)(μ-C═CH2)(μ32-HCCH)] (4; Cp* = η5-C5Me5), was synthesized by the reaction of [(Cp*Ru)33-CH)(μ33-C3MeH2−)]+ (3a) with KN(SiMe3)2 via deprotonation of the methyl group on the μ33-C3 ring followed by C–C bond cleavage. The reaction of 4 with an electrophile resulted in the reconstruction of the μ33-C3 ring via the coupling of two hydrocarbyl moieties at the Ru3 site. The reaction of 4 with iodomethane resulted in C–C bond formation at the β-carbon atom of the vinylidene ligand, leading to the formation of [(Cp*Ru)33-CH)(μ33-C3EtH2−)]+ (3c). These unprecedented skeletal rearrangements arose from the unique electronic properties of the μ33-C3 ring, which comprised three unsaturated μ-carbenes.

中文翻译:

一个μ的可逆变换33 -C 3环成μ 32 -Ethyne和μ -偏二配体在去质子化后和质子化三钌站点

甲μ-亚乙烯基μ 32 -ethyne络合物,[(CP * Ru)的3(μ 3 -CH)(μ-C = CH 2)(μ 32 -HCCH)](4 ; *的Cp =η 5 -C 55),由反应合成[(CP * Ru)的3(μ 3 -CH)(μ 33 -C 3 MEH 2 - )] +3A)配有KN(森达32经由在μ的甲基基团的脱质子化33 -C3个环,然后进行C–C键裂解。的反应4与亲电子导致μ的重建33 -C 3环通过两个烃基部分的耦合在茹3部位。的反应4与碘甲烷导致在亚乙烯基配体的β碳原子上的C-C键的形成,从而导致[(CP *钌)的形成3(μ 3 -CH)(μ 33 -C 3 EtH 2-)] +3c)。这些前所未有的骨骼重排是由μ的独特电子特性引起的33 -C 3环,其由三个不饱和μ-卡宾。
更新日期:2020-12-28
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