Preparation of dicyclopentadienyldiphenylphosphine-hydridomolybdenum(IV) chloride and its reactions with electron poor alkynes RCCR′ (R R′ CF3, CO2Me; R H, R′ CN). Formation of molybdaphosphacyclobutanes and x-ray structure of [(η5-C5H5)2 Ph2]Cl·H2O

摘要: Abstract Reaction of PPh 2 Cl with (η 5 -C H ) MH (M = Mo, W) in toluene give the ionic complexes [(η MH(PPh H)]Cl. The reactions molybdenum derivative electron poor alkynes RCCR′ (R R′ CF 3 (hfb), CO Me (dmad); R H, CN (mca)) were studied, and insertions into MoH bond, leading to either Mo(PPh H)(σ-CRCHR′)] + (hfb, dmad, mca) or molecular species MoCl(σ-CR′CHR)] (dmad, mca), observed. In case hfb dmad cationic metallaphosphacy-clobutanes MoCHRCHRP Ph ] formed. An X-ray diffraction study latter complex, derived from hfb, revealed an structure presence water hydration centrosymmetric triclinic cell ( P 1 , a 7.919(8), b 9.689(7), c 16.613(11) A, α 81.52(5), β 80.82(5), γ 82.44(5)°). molecules chloride ligands are involved hydrogen bonding. MoP bond length is 2.487(1) that MoC( sp 2.299(3) CMOP angle 63.8(1)°.