233594-93-9Relevant academic research and scientific papers
Synthesis and characterisation of the bidentately attached linear triphos complexes 2-RC2R)> . X-ray crystal structures of 2-PhC2Ph)> (X = Br and I) and
Baker, Paul K.,Drew, Michael G. B.,Meehan, Margaret M.,Szewczyk, John
, p. 265 - 272 (1999)
Reaction of equimolar quantities of 2-RC2R)2> and L in CH2Cl2 at room temperature gives the bidentately coordinated triphos complexes 2-RC2R)> (M = Mo, X = Y = I, R = Me or Ph; M = W, X = Y = Br, R = Me or Ph; M = W, X = Br, Cl, Y = I, R = Me or Ph) (1-8) in high yield. The molecular structures of 2-PhC2Ph)> (X = Br, I) have been determined crystallographically and are equivalent. The coordination geometry about the tungsten atom in both complexes is distorted octahedral with two adjacent phosphorus atoms in the triphos ligand, a halide and a carbonyl ligand occupying the equatorial plane, with the diphenylacetylene and the other halide atom occupying the axial positions. The 13C-NMR spectrum of WBr2(CO)(L-P,P')η2-PhC2Ph (4) shows the diphenylacetylene ligand is donating four electrons to the metal. Refluxing a slightly wet acetonitrile solution of 2-MeC2Me)> for 24 h affords the unusual crystallographically characterised molybdenum(IV) oxidised triphos complex (MoI2(O)> (9). - Keywords: Molybdenum; Tungsten; Alkynes; Triphos; Carbonyls; Halide; Crystal structure; Oxide complex
