289914-44-9Relevant academic research and scientific papers
Reactions of ruthenium cyclopropenyl complexes containing pentamethylcyclopentadienyl ligands
Chang, Chao-Wan,Lin, Ying-Chih,Lee, Gene-Hsiang,Wang
, p. 3211 - 3219 (2008/10/08)
Deprotonation of cationic pentamethylcyclopentadienyl dppp ruthenium vinylidene complexes containing electron-withdrawing groups at the vinylidene ligand yielded cyclopropenyl complexes [Ru]-C=C(Ph)CHR ([Ru] = (η5-C5Me5)(dppp)Ru, dppp = Ph2PCH2CH2CH2PPh2, R = CN, 3a; R = CO2CH3, 3b). Insertion of acetone into the three-membered ring of 3a gave the neutral dihydrofuranyl complex [Ru]-C=C(Ph)CH(CN)CMe2O (4). Electrophilic addition at Cβ of 4 afforded cationic carbene complexes [[Ru]=CC(R′)(Ph)CH(CN)C(CH3)2O]+ (R′ = CH2CN, 5a; R′ = CH2CO2CH3, 5b; R′ = H, 7; R′ = HgCl, 8). Complexes 5a and 5b transformed to [[Ru]=CC(Ph)=C(CN)C(CH3)2O]+ (6) by elimination of small organic molecules. Reactivity of ruthenium complexes with a C5Me5 ligand is different from those with a C5H5 ligand and could be ascribed to electronic and steric effects. Reaction of [Ru]N3 with ICH2CN gave [Ru]-NCH2I (11). Crystal structures of complexes 3a, 4, 6, 7, and 11 are also reported.
