You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Excited Electronic States of 1, 3-butadiene
R. K. Nesbet
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences
Vol. 230, No. 1182 (Jun. 21, 1955), pp. 322-330
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/99733
Page Count: 9
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Approximate self-consistent orbitals for excited electronic states of cis- and trans-1, 3-butadiene are obtained by a modification of Roothaan's procedure, in the non-empirical π -electron approximation. The integrals used were evaluated by Parr & Mulliken for calculation of the ground-state electronic wave function. The effects of configuration interaction are calculated by an approximate method and compared with an exact calculation. Molecular orbitals have been obtained both with and without the auxiliary condition that spatial factors of both α and β spin-orbitals should be members of a single orthogonal set. Semi-empirical values for the basic integrals, due to Pariser & Parr, have also been used to calculate the energies of excited states by the approximate configuration interaction method. Energy levels derived from the Pariser-Parr integrals are in close agreement with observed levels, which differ considerably from those calculated from the Parr-Mulliken non-empirical integrals.
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences © 1955 Royal Society