Open AccessThe electronic structure of conjugated systems. Parts III and IV
Author(s) -
C. A. Coulson,
Hugh Christopher Longuet-Higgins
Publication year - 1948
Publication title -
proceedings of the royal society of london a mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1948.0056
Subject(s) - conjugated system , polarizability , bond order , bond , resonance (particle physics) , chemistry , coulomb , atom (system on chip) , sign (mathematics) , perturbation theory (quantum mechanics) , computational chemistry , molecular physics , chemical physics , crystallography , atomic physics , bond length , quantum mechanics , physics , mathematics , molecule , organic chemistry , computer science , mathematical analysis , crystal structure , finance , electron , economics , embedded system , polymer
This part is concerned with the changes in bond order that take place in a conjugated system when the resonance integral of a bond, or the coulomb term of an atom is altered. It is shown that the sign of the mutual polarizability of two bonds in a chain depends upon whether there is an even or odd number of other bonds between them. Numerical values are given for mutual bond polarizabilities in some important hydrocarbons, and it is found that in the polyenes the effect of a perturbation decreases rapidly with distance along the chain. The effect of hetero-substitution on bond orders is considered, and the results compared with the predictions of the qualitative resonance theory.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom