109Ag{1H} INEPT n.m.r. studies on the silver heteronuclear cluster compounds [Ag2Ru4(µ3-H)2{µ-Ph2P(CH2)nPPh2}(CO)12](n= 1, 2, or 4). Direct evidence for intramolecular metal core rearrangements in solution and the first measurement of 1J(107,109Ag107,109Ag)

Abstract

Resonances from the silver atoms in the mixed-metal cluster compounds [Ag₂Ru₄(µ₃-H)₂{µ-Ph₂P(CH₂)_nPPh₂}(CO)₁₂](n= 1, 2, or 4) have been detected using ¹⁰⁹Ag{¹H} INEPT n.m.r. spectroscopy; this technique provides the first direct evidence that, in solution at ambient temperature, group 1_B metal heteronuclear clusters undergo an intramolecular fluxional process involving a rearrangement of their metal skeletons and values of ¹J(^107,109Ag^107,109Ag) have been measured for the first time.