Triphenylphosphonioacetylide: A Species Isoelectronic with Isocyanides
摘要:
Stabilized only by triphenylphosphane, the title compound 1 was synthesized and investigated theoretically (the HOMO of 1 is depicted on the right). Both calculations and experimental NMR spectra show that no Lewis structure can describe the geometry and charge distribution accurately. Compound 1 undergoes an equivalent of the Passerini reaction. Ph3 P+ -C≡C- : 1.
Reactions of [Ru(CO)<sub>2</sub>(PPh<sub>3</sub>)<sub>3</sub>] with Alkynylphosphonium Salts: Phosphaallenylidene vs Phosphonioacetylide Coordination
作者:Richard L. Cordiner、Anthony F. Hill、Jörg Wagler
DOI:10.1021/om9003384
日期:2009.8.24
[Ru(CO)(2)(PPh3)(3)] reacts with [Me3SiC CPPh3]OTf in the presence of moist [(Bu4N)-Bu-n]F to provide the C-H activation product [RuH(C CPPh3)(CO)(2)(PPh3)(2)]OTf, spectroscopic and structural data for which are used to assess the previously proposed analogy between phosphoniacetylide and phosphaallenylidene (cf. isonitriles) bonding descriptions in an organometallic context.