|
|Section2= |Section3= }} Triphenyl phosphite is the chemical compound with the formula P(OC6H5)3. This colourless viscous liquid is the ester of phosphorous acid and phenol. It is used as a ligand in organometallic chemistry. Nickel complexes of this ligand are homogeneous catalysts for the hydrocyanation of alkenes. Triphenylphosphite is prepared from phosphorus trichloride and phenol in the presence of a base: :PCl3 + 3 HOC6H5 → P(OC6H5)3 + 3 HCl Trimethylphosphine is prepared from triphenylphosphite:〔Leutkens, Jr., M. L.; Sattelberger, A. P.; Murray, H. H.; Basil, J. D.; Fackler, Jr., J. P. "Trimethylphosphine" Inorganic Syntheses, 1990, volume 28, pages 305-310. ISBN 0-471-52619-3〕 : 3 CH3MgBr + P(OC6H5)3 → P(CH3)3 + 3 MgBrOC6H5 Triphenylphosphite is a notable example of polyamorphism in organic compounds, namely it exists in two different amorphous forms at temperatures about 200 K. Not long ago a new long-awaited polymorphic modification of triphenyl phosphite was obtained by means of crystallization in ionic liquids 〔D.G. Golovanov, K.A. Lyssenko, M.Yu. Antipin, Ya.S. Vygodskii, E.I. Lozinskaya, A.S. Shaplov. ”Long-awaited polymorphic modification of triphenyl phosphite“, Cryst. Eng. Comm., 2005, v. 7, no. 77, P.465 – 468. (doi: 10.1039/b505052a ) 〕 ==Representative coordination complexes== Triphenylphosphite forms zero-valent complexes of the type M()4 for M = Ni, Pd, Pt. The colourless nickel complex (melting point 147 °C) can be prepared from the nickel(0) complex of 1,5-cyclooctadiene:〔Ittel, S. D. "Olefin, Acetylene, Phosphine, Isocyanide, and Diazene Complexes of Nickel(0)" Inorganic Syntheses, 1977, volume XVII, p. 117–124. ISBN 0-07-044327-0,〕 : Ni(COD)2 + 4 P(OC6H5)3 → Ni()4 + 2 COD It also forms a variety of Fe(0) and Fe(II) complexes such as the dihydride H2Fe()4. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「triphenyl phosphite」の詳細全文を読む スポンサード リンク
|