calculations of dipole moment derivative

[<pesquer "at@at" lpct.u-bordeaux.fr>]

 The analysis of IR spectra of isolated CH stretching vibration, in
 molecules like CHD2X (X being a very polarisable group), shows that the
 dipole moment derivative d(mu)/dq (q= CH stretching coordinate), is no
 longer colinear to the stretched bond. It seems quite probable that this
 rotation of the dipole change vector away from the direction of
 displacement, may be because the motion of the H atom charge induces a
 dipole in the polarizable group, so that the resultant dipole change vector
 rotates. We want to calculate the induced and resultant dipoles. Is it
 possible by ab-initio calculations, using GAUSSIAN 92 program?
 Thank you for your answers.
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 *  Michel PESQUER            E-Mail:   pesquer "at@at" lpct.u-bordeaux.fr
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 * Labo:  Physicochimie theorique. - U.B.I. -
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 * Delegation Regionale du CNRS. - B.P.105  - 33402 Talence Cedex
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