We describe chemical bond changes as Franck–Condon electronic processes within a new theoretical ansatz that we call 'rigged' Born–Oppenheimer (R-BO) approach. The notion of the separability of nuclear and electron states implied in the standard Born–Oppenheimer (BO) scheme is retained. However...
[Li(thf){As(But)As(But)2}]2(thf = tetrahydrofuran), produced from the interaction of LiAs(But)2 with MgBr2(2 : 1) in thf, is a dimer with two Li atoms bridging two–As(But)As(But)2 groups and with a planar Li2As2 core [Li–As 2.58(2), As–As 2.403(2), Li Li 3.290(...
Introduction With a production volume of 280 million tons per year the polymer industry is one of the major fields in chemical industry. Polymer extrusion ... R Habla,S Obermeier - 12 Aiche Meeting 被引量: 0发表: 2012年 My invention relates to overrunning clutches for the transmission of pow...
公开/公告号: WO0170669A3 公开/公告日期: 2003-01-23 申请(专利权)人: ORTHO-MCNEIL PARMACEUTICAL, INC. 发明人: R Armin 摘要: A process for forming an amide bond comprising reacting a carboxylic acid with an amine carboxylate salt, in the presence of an inorganic base.收藏...
Surveys the data on the behavior of Silicon Lewis acids (SLA) in carbon-carbon bond forming processes. Synthesis, storage and solvent compatibility of SLA; Lewis acidity of silicon derivatives; Principles of action of SLA. AAD Dilman,SL Ioffe - 《Chemical Reviews》 被引量: 0发表: 2003年 ...
Formation of CH3(a) below 200 K on this surface is inferred from the lack of molecular desorption as well as the lack of recombinative hydrogen desorption in temperature‐programmed reaction (TPR) experiments. Similar low temperature C–I bond dissociation in CH2I2 to form CH2(a) is ...
The phosphorylating agent 2-chlorophenyl-O,O-bis[1-benzotriazolyl]phosphate has been used for the introduction of a phosphodiester bond between the hydroxy... C Schattenkerk,CTJ Wreesmann,MJD Graaf,... - 《Tetrahedron Letters》 被引量: 63发表: 1984年 Chemical synthesis of natural and modified ...
In the method according to the invention, as soon as a new fractured surface is formed, it is brought into immediate contact with an environment V1 the physico-chemical property of which is so selected that a firm bond or compound is formed between the fractured surface and the molecules of...
Supercooled liquids and metallic glasses can be viewed as defected states of bond orientational order. Surfaces of constant negative curvature contain an i... Nelson,R David - 《Phys.rev.lett》 被引量: 199发表: 1983年 Dynamic Heterogeneity in a Glass Forming Fluid: Susceptibility, Structure Facto...
Nature of chemical bond and phase stability of hydrogen storage compounds. It is found that hydrogen interacts more strongly with hydride non-forming elements, B, (e.g. Ni, Mn, Fe) than hydride forming elements, A, (e.g... Morinaga,M.,Yukawa,... - 《Materials Science & Engineering A...