Phosphorus ylide niobium complexes; synthesis and characterization of the first α-keto ylide complexes, [NbCl3(ylide-O,N)2] and [NbCl3(ylide-O,N) (RCCR′)] (ylide = [2-thiazolylcarbonylmethylene]triphenylphosphorane, NOSC4H2CHPPh3). Molecular structure of [NbCl3(NOSC4H2CHPPh3-O,N) (PhCCPr) (Ph = phenyl, Pr = propyl) | Publicación