810659-40-6Relevant academic research and scientific papers
Synthesis of the first pentacarbonyltungsten(0) complexes with P-pentamethyl-cyclopentadienyl-substituted 1H-phosphirene ligands: Crystal structure of [{Me5C5PC(H)=CPh}W(CO)5]
Streubel, Rainer,Bode, Maren,Schiemann, Udo,Wismach, Cathleen,Jones, Peter G.,Monsees, Axel
, p. 1215 - 1219 (2004)
The tungsten(0) complex [{Me5C5PC(Ph)=N}W(CO) 5] (1) reacts upon heating with alkyne derivatives 3a-e in toluene to form benzonitrile and the complexes [{Me5C5PC(R 1)=C(R2)}-W(CO)5] (4a-e) (4a: R1 = OEt, R 2 = H; 4b: R1 = OEt, R2 = SiMe3; 4c: R1 = Ph, R2 = H; 4d : R1 = Ph, R2 = Ph; 4e: R1, R2 = Et), which were purified by column chromatography (except 4d). In reaction of 1 with 3d the tungsten(0) complex 5, having a 2,3-dihydro-1,2,3-azadiphosphete ligand, is formed in a competing reaction. Spectroscopic and mass spectrometric data of complexes 4a-c, 4e and 5 are discussed. The structures of complexes 4c and 5 were determined by single-crystal X-ray diffraction In 4c the three-membered ring has a C=C bond length of 1.312(3) A and a C-P-C angle of 43.02(9)°. In 5 the P-P bond length is 2.2866(7) A; the four-membered ring is slightly folded (fold angle 15° about P1-C6).
