A closer look at the phosphorus-phosphorus double bond lengths in meta-terphenyl substituted diphosphenes |
| |
Authors: | John D Protasiewicz Marlena P Washington John L Payton |
| |
Institution: | a Department of Chemistry, Case Western Reserve University, Cleveland, OH 44106, USA b Department of Chemistry and Physics and the Photon Factory, University of Auckland, Auckland, New Zealand |
| |
Abstract: | The single crystal X-ray structure of DmpP PDmp (1, Dmp = 2,6-Mes2C6H3), which was previously reported to have a relatively short P P bond distance of 1.985(2) Å at room temperature, has been reexamined at variable temperatures. Crystallographic analyses of 1 at 100 K allow for resolution of disorder of the two phosphorus atoms (which is unresolvable from room temperature diffraction data), and for determination of a more conventional P P bond length of 2.029(1) Å. Single crystals of the closely related diphosphene DxpP PDxp (2, Dxp = 2,6-(2,6-Me2C6H3)2C6H3) show similar disorder in one of two crystallographically independent molecules in the unit cell. A value of 2.0276(4) Å is found for the non-disordered P P bonds at 100 K for 2. A new diphosphene Ar′P PAr′ (3, Ar′ = 2,6-Mes2-4-OMe-C6H3) has been prepared and its structure has also been examined. The P P bond length for 3 was determined to be 2.0326(9) Å and relatively free of the effects of disorder. |
| |
Keywords: | Diphosphene Main group X-ray structure Double bonds |
本文献已被 ScienceDirect 等数据库收录! |
|