在化学领域中，valence bond theory指的是“价键理论”。价键理论是一种关于化学键的基本理论。是海特勒和伦敦于1927年用量子力学处理氢分子所得结果的推广和发展。基本要点是：（1）若原子A和原子B各有一未成对电子且自旋相反，则可互相配对而构成共价单键，如原子A和原子B各有两个或三个未成对电...
The Heitler–London theory for H2 is the simplest example of the VB theory, which is applied to the covalent part of the wavefunction for H2. In the VB theory, the formation of a covalent bond between two atoms is possible if the atoms have, in their valence shell, orbitals containing ...
Valence bond theory describes bonding as a consequence of the overlap of two separate atomic orbitals on different atoms that creates a region with one pair of electrons shared between the two atoms. When the orbitals overlap along an axis containing the nuclei, they form a σσ bond. When th...
Valence Bond Theory Another topic that you’ll need to be familiar with for the SAT II Chemistry test is that of valence bond theory. By now, you are aware that two atoms will form a bond when there is orbital overlap between them, and a maximum of two electrons can be present in ...
二 价键理论 ( Valence Bond Theory ) 1927年,Heitler 和 London 用量子力学处理氢气分子 H2 ,解决了两个氢原子之间的化学键的本质问题,使共价键理论从经典的 Lewis 理论发展到今天的现代共价键理论。;从图中可以看出,r = r 0 时, V 值最小,为 V = -D ( D 0 ,- D 0 ) ,; H2 中的化学键,...
Theory of hybrid atomic orbital is part of modern valence bond theory and a difficult point in inorganic chemistry teaching. 杂化轨道理论是现代价键理论的一部分,也是大学无机化学教学的一个难点。 www.chemyq.com 2. Valence-bond theory was formed on the basis of the classical ideas of valence bond...
1927年, Heitler 和 London 用量子力学处理氢气分子H2, 解决了两个氢原子之间化学键的本质问题, 使共价键理论从典型的Lewis理论发展到今天的现代共价键理论. . 氢分子中的化学键 量子力学计算表明, 两个具有 电子构型的 H 彼此靠近, 两个 1s 电子以自旋相反的方式形成电子对, 使体系的能量降低. chemsir...
The valence bond theory considers a chemical bond to be formed by electrons occupying orbitals that are characteristic of the whole molecule. From: Chemistry: With Inorganic Qualitative Analysis, 1980 About this pageAdd to MendeleySet alert
The Heitler–London theory for H2 is the simplest example of the VB theory, which is applied to the covalent part of the wavefunction for H2. In the VB theory, the formation of a covalent bond between two atoms is possible if the atoms have, in their valence shell, orbitals containing ...
A THEORY OF FINANCING CONSTRAINTS AND FIRM DYNAMICS一种融资约束与公司动力学理论 热度: Essay Valence Bond Theory for Chemical Dynamics DONALD G. TRUHLAR Department of Chemistry and Supercomputing Institute, University of Minnesota, 207 Pleasant Street S.E., Minneapolis, Minnesota 55455-0431 ...