GENERATION OF [C5(CH3)5RU(NO)(CH3)(H2O)]- (AR'=3,5-C6H3(CF3)2) AND ITS REACTION WITH METHYL ACRYLATE TO PRODUCE CHELATE COMPLEXES OF THE TYPE C5(CH3)5RU(NO)(CH(R)CH2COOCH3)+ (R=H, CH3)([BAR'4])

Protonation Of C6(CH3)5Ru(NO)(CH3)2, 8, with [(3,5-(CF3)2C6H3)4B]-[H(O Et2)2]+ in the presence of water generates the complex C5(CH3)5Ru(NO)( CH3)(H2O)+, 9, which upon treatment with methyl acrylate yields a tran sient eta2-acrylate complex C5(CH3)5]Ru(NO)(CH2CHCO2CH3)CH3+, 10, obse rved by H-1NMR spectroscopy. Migratory insertion in 10 gives the chela te complex C5(CH3)5Ru(NO)(CH(CH3)COOCH3)+, 12, which has been fully ch aracterized by conventional spectroscopic methods (H-1 and C-13 NMR sp ectroscopy) and by a single-crystal X-ray analysis (C47H36BF24NO3Ru, m onoclinic, P2(1), a = 12.124(2) angstrom, b = 17.376(4) angstrom, c = 13.355(2) angstrom, beta = 116.31(1)-degrees, V = 2522.0 angstrom3, an d Z = 2). Treatment of 12 with excess methyl acrylate results in conve rsion to the unsubstituted chelate C5(CH3)5Ru(NO)(CH2CH2COOCH3)+, 5.