Abstract

The contact contribution to 13C-H, 13C-13C and to geminal and vicinal coupling constants is calculated according to Pople and Santry's theory using molecular orbital wave functions developed by Newton et al. (NEMO wave functions). The calculated 13C-H and 13C-13C coupling constants are in better agreement with experiment than those obtained by the EHT or CNDO method. This must be due to the inclusion of carbon 1s orbitals in the LCAO basis set of the NEMO wave function.

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