15004-86-1Relevant articles and documents
Synthetically versatile (trifluoromethanesulfonato)metal amine complexes
Dixon, Nicholas E.,Lawrance, Geoffrey A.,Lay, Peter A.,Sargeson, Alan M.
, p. 2940 - 2947 (2008/10/08)
Facile synthetic routes to complexes of the labile unidentate coordinated trifluoromethanesulfonate (-OSO2CF3) ion are reported for M(NH3)5(OSO2CF3)n+ (M = Rh(III), Ir(III), Cr(III), Ru(III) where n = 2; M = Pt(IV) where n = 3), M(NH2CH3)5(OSO2CF3) 2+ (M = Co(III), Rh(III), Cr(III)), cis-M(en)2(OSO2CF3)2+ (M = Rh(III), Ir(III), Cr(III)), and trans-M(en)2Cl(OSO2CF3)+ (M = Rh(III), Ir(III)). The utility of these synthetically versatile intermediates in the preparation of a variety of complexes containing neutral ligands is illustrated. Rate constants for the aquation of the triflato complexes in 0.1 M CF3SO3H at 25°C span 3 orders of magnitude and for the pentaammine complexes show a reactivity order of Ru(III) > Co(III) ~ Cr(III) ~ Rh(III) ? Ir(III) ? Pt(IV). For the pentakis(methylamine) complexes, the aquation rate is greater for Co(III), slightly greater for Rh(III), and smaller for Cr(III) in comparison to the corresponding pentaammine complexes. The aquations of M(en)2X(OSO2CF3)+ proceed largely without isomerization (2(OSO2CF3)2+ ions, consecutive first-order aquation processes are observed with rate constants k1 ~ 2k2.