880105-94-2Relevant academic research and scientific papers
Reactions of CpArCHCHArCp with Ru3(CO)12: An unexpected cleavage of a bridging C-C bond and coupling of the two cyclopentadienyl rings to fulvalene diruthenium complexes
Li, Bin,Wang, Baiquan,Xu, Shansheng,Zhou, Xiuzhong,Song, Haibin
, p. 1158 - 1166 (2006)
Reactions of CpArCHCHArCp [Ar = Ph (1), p-MeOC6H4 (2)] with Ru3(CO)12 in refluxing xylene afforded the unexpected bridging C-C cleavage and cyclopentadienyl coupling products: the 2,2′-bisubstituted fulvalene diruthenium complexes (η5: η5-2,2′-ArCH2C5H3C 5H3CH2Ar)Ru2(CO)4 [Ar = Ph (5), p-MeOC6H4 (9)] and the partially hydrogenated products (η5:η3-ArCH2C 5H3C5H6CHAr)Ru2(CO) 4 [Ar = Ph (4), p-MeOC6H4 (8)], in addition to the normal bridged bis(cyclopentadienyl) tetracarbonyl diruthenium complexes (ArCHCHAr)[(η5-C5H4)Ru(CO)] 2(μ-CO)2 [Ar = Ph (7), p-MeOC6H4, (10)]. When ligand (tBuC5H4)PhCHCHPh( tBuC5H4) (3) reacted with Ru 3(CO)12, the tetrasubstituted fulvalene diruthenium complex (η5:η5-PhCH2 tBuC5H2C5H2 tBuCH2Ph)Ru2(CO)4 (11) and three normal bridged bis-(cyclopentadienyl) diruthenium complexes (PhCHCHPh) [(η5-tBuC5H3)Ru(CO)] 2(M-CO)2 (12-14) were obtained. The molecular structures of 4, 5, 7-meso, 7-rac, 8, 10-meso, 11, 12, 13, and 14 were determined by X-ray diffraction. The stereochemistry of the reaction was also studied, and the possible mechanism was discussed.
