Characterization of an optically active pentacoordinate phosphorane with asymmetry only at phosphorus
نویسندگان
چکیده
منابع مشابه
Molecular Orbital Theory of Pentacoordinate Phosphorus
The electronic structure of some idealized PH5 geometries of D3h, C4v, and C, symmetries is analyzed. Each geometry is characterized by a low-lying nodeless orbital, three singly noded orbitals close in energy, and a high-lying doubly noded nonbonding orbital. The latter orbital is the only one significantly stabilized by the inclusion of 3d orbitals in the P basis set and also determines the r...
متن کاملsynthesis and characterization of potentially biological active cyclometallated organoplatinum(ii) complexes
this work is presented in five parts. in the first part preparation of the starting complex [pt(c^n)cl(dmso)], 1, in which c^n = n(1),c(2?)-chelated, deprotonated 2-phenylpyridine, and dmso = dimethylsulfoxide, and its reaction with 1 equiv of the biphosphine ligands bis(diphenylphosphino)amine, dppa, or bis(diphenylphosphino)methane, dppm, to give the complex [pt(c^n)cl(dppa)], 2, or [pt(c^n)c...
15 صفحه اولSynthesis and characterization of optically active polyester thin-film bionanocomposite membrane achieved by functionalized cellulose /silica for gas permeation
Optically active bionanocomposite membranes composed of polyester(PE) and cellulose /silica bionanocomposite (BNCs) are a novel method to enhance gas separation performance. Commercially available silica nanoparticles were modified with biodegradable nanocellulose through ultrasonic irradiation technique. Transmission electron microscopy (TEM) analyses showed that the cellulose/silica composite...
متن کاملSynthesis and characterization of optically active polyester thin-film bionanocomposite membrane achieved by functionalized cellulose /silica for gas permeation
Optically active bionanocomposite membranes composed of polyester(PE) and cellulose /silica bionanocomposite (BNCs) are a novel method to enhance gas separation performance. Commercially available silica nanoparticles were modified with biodegradable nanocellulose through ultrasonic irradiation technique. Transmission electron microscopy (TEM) analyses showed that the cellulose/silica composite...
متن کاملIsolable Phosphanylidene Phosphorane with a Sterically Accessible Two-Coordinate Phosphorus Atom**
Phosphanylidene-s-phosphoranes (RP=PR’3) are phosphorus analogues of alkylidene-s-phosphoranes (R2C=PR’3), better known as Wittig reagents. Phosphanylidene-s-phosphoranes are synthetically accessible in the free form (RP= PR’3) and also in the transition-metal-stabilized form (LnM !P(R)=PR’3). [1] The latter complexes are commonly used in both P=C bond generation and as a source of the phosphin...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Tetrahedron Letters
سال: 1994
ISSN: 0040-4039
DOI: 10.1016/0040-4039(94)88219-3