164987-09-1Relevant articles and documents
Amphiphilie kationischer η2-Phosphinocarbenkomplexe des Wolframs
Ostermeier, J.,Hiller, W.,Kreissl, F. R.
, p. 283 - 290 (1995)
η2-Phosphinocarbene complexes of tungsten containing a trimethyl-phosphine ligand show an amphiphilic behavior.With the Lewis acid SMe+ an electrophilic attack occurs at the metal-carbon double bond to give 1-tungsta-2-phospha-4-thiabicyclobutane complexes.On the contrary the Lewis base, PMe3, adds at the carbene carbon atom to yield a cationic trimethylphosphoraneylidene complex.However, treatment of dicarbonyl(η5-cyclopentadienyl)2-(diphenylphosphino)methylcarbene>-tungsten-tetraphenylborate with the less nucleophilic triethylamine causes deprotonation at the methyl group providing dicarbonyl(η5-cyclopentadienyl)-η2-diphenylphosphinovinyltungsten.Keywords: Tungsten; Amphiphilic carbene complexes; Phosphino carbene complexes