CH bond dipole

Abstract
The effect of choice of basis set, variation of geometry and constancy of the CH bond dipole calculated from localized orbitals is discussed. Although there is still a difficulty in reconciling the calculated µ(C+H)≈ 1.7 D† with that generally used [µ(CH+)≈ 0.4 D], the results show that the calculated bond dipole is moderately constant with underlying trends, almost independent of choice of basis set and insensitive to changes in molecular geometry.

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