σ-σ AND π-π interactions in complementary bases |
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Authors: | H. Chojnacki W.A. Sokalski |
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Affiliation: | Department of Physical Chemistry, Institute of Organic and Physical Chemistry, Wroc?aw, Wybrze-ze Wyspiańskiego 27 Poland |
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Abstract: | The perturbation energies for model ammonia and imidazole systems have been calculated using all valence molecular orbitais in a LCMO formulation. With semi-empirical parametrization the method was extended to the adenine-thymine and guanine-cytosine base pairs. The results indicate that the σ-σ interactions are dominant, whereas the π-π component confers only a negligible contribution to the stabilization energy. |
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