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Reactions of ruthenium benzylidenes with H2O to give benzaldehyde and (aqua)ruthenium complex |
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| Authors: | Mieock Kim Moon Young Jin Chul Wee Lee Chong Shik Chin |
| Institution: | a Chemical Technology Division, Korea Research Institute of Chemical Technology, P.O. Box 107 Yuseong, Daejon, Seoul 305-600, Korea b Advanced Materials Division, Korea Research Institute of Chemical Technology, P.O. Box 107 Yuseong, Daejon, Seoul 305-600, Korea c Chemical Analysis Laboratory, Korea Research Institute of Chemical Technology, P.O. Box 107 Yuseong, Daejon, Seoul 305-600, Korea d Department of Chemistry, Sogang University, Seoul 121-742, Korea |
| Abstract: | The second generation of Grubbs type catalyst, (PCy3)(H2IMes)Cl2Ru CHPh (1) undergoes the Cl replacement with CH3CN to give cationic ruthenium carbene complexes, (RCN)3(H2IMes)RuCHPh](OTf)2 (2, R = CH3 (a), Ph (b)) in the presence of AgOTf. The reaction of 2a with H2O in the presence of CH3CN gives (aqua)ruthenium complex, Ru(H2IMes)(NCCH3) 4(H2O)](OTf)2 (3) and benzaldehyde. Benzaldehyde is also observed in the reaction of 1 with H2O. Plausible reaction pathways are suggested for the degradation of ruthenium benzylidenes to give benzaldehyde on the basis of the isotope labeling experiments. |
| Keywords: | Ruthenium benzylidene Aquaruthenium complex Ruthenium Degradation |
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