Abstract
Isotropic dipole oscillator strength distributions (DOSDs) have been constructed for the dimethyl, diethyl and methyl–propyl ether molecules through the use of quantum mechanical constraint techniques and experimental dipole oscillator strength data. The constraints are furnished by molar refractivity data and the Thomas–Reiche–Kuhn sum rule. The DOSDs are used to obtain recommended values for a variety of isotropic dipole oscillator strength sums, logarithmic dipole oscillator strength sums, and mean excitation energies for the molecules. Pseudo-DOSDs for the ethers are also constructed and used to obtain reliable results for the isotropic dipole–dipole dispersion energy coefficients for all two-body interactions of the ethers with each other and with fifty other species. In addition reliable results are also obtained for the triple–dipole dispersion energy coefficients for all three-body interactions involving the ethers.
1Dedicated to Anthony Stone, an excellent scientist and friend, on the occasion of his 70th birthday.
Acknowledgements
The authors wish to thank C.E. Brion, G. Cooper, and R. Feng for making their dipole oscillator strengths for the ether molecules available in a digital format. This research was supported by a grant from the Natural Sciences and Engineering Research Council of Canada.
Notes
2Associated with the Center for Interdisciplinary Studies in Chemical Physics, University of Western Ontario.
1Dedicated to Anthony Stone, an excellent scientist and friend, on the occasion of his 70th birthday.