A NEW HETEROBIMETALLIC RUTHENIUM(II) COMPLEX: SYNTHESIS, SPECTRAL STUDIES AND CATALYTIC ACTIVITY POTENTIAL IN THE TRANSFER HYDROGENATION OF KETONES

S.O. Owalude, A.C. Tella, U.B. Eke, E.O. Odebunmi

Abstract


A new heterobimetallic ruthenium(II) complex with general formula [Ru(NCCH3)2(P(OMe)2Ph)2- (dppf)][BF4]2. {NCCH3 = acetonitrile P(OMe)2Ph = dimethylphenylphosphonite, dppf =  1,1’-bis-{diphenylphosphino}ferrocene} was synthesized from a one pot reaction of [Ru(COD)-(NCCH3)4][BF4]2, dimethylphenylphosphonite and 1,1’-bis{diphenylphosphino}ferroc-ene in dichloromethane under continuous stirring. The complex was characterized by NMR (31P{1H}, 1H and 13C), vibrational spectroscopy (FTIR) and elemental analysis. Catalytic performance of the complex in the transfer hydrogenation of cyclohexanone was investigated. An 80% conversion was achieved at a substrate to catalyst ratio of 1250 with 98% selectivity.

Keywords: Heterobimetallic ruthenium, transfer hydrogenation, cyclohexanone, 1,1’-bis{diphenylphosphino}ferrocene, dimethylphenylphosphonite.


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