|
|Section2= |Section3= |Section4= |Section8= }} Trimethylphosphine is the organophosphorus compound with the formula P(CH3)3, commonly abbreviated as PMe3. This colorless liquid has a strongly unpleasant odor, which is characteristic of alkylphosphines. The compound is a common ligand in coordination chemistry. ==Structure and bonding== It is a pyramidal molecule with approximate ''C''3''v'' symmetry — the molecular point group of ammonia (NH3) and phosphine (PH3). The C–P–C bond angles are approximately 98.6°.〔 The C–P–C bond angles are consistent with the notion that phosphorus predominantly uses the 3p orbitals for forming bonds and that there is little sp hybridization of the phosphorus atom. The latter is a common feature of the chemistry of phosphorus because the gap between the 3s and 3p orbital is large compared to the corresponding gap for the 2s and 2p orbitals that are in the valence shell for carbon, nitrogen, and oxygen (elements for which sp-mixing is strong). As a result, the lone pair of trimethylphosphine has predominantly s-character as is the case for phosphine, PH3.〔E. Fluck, The chemistry of phosphine, Topics in Current Chemistry Vol. 35, 64 pp, 1973.〕 PMe3 is usually be prepared by the treatment of triphenyl phosphite with methylmagnesium chloride: : 3 CH3MgCl + P(OC6H5)3 → P(CH3)3 + 3 C6H5OMgCl The synthesis is conducted in dibutyl ether, from which the more volatile PMe3 can be distilled. 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「Trimethylphosphine」の詳細全文を読む スポンサード リンク
|