Bound states of the positron with nitrile species with a configuration interaction multi-component molecular orbital approach

Literature Information

Publication Date 2010-12-10
DOI 10.1039/C0CP01650K
Impact Factor 3.676
Authors

Masanori Tachikawa, Yukiumi Kita, Robert J. Buenker


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Abstract

Characteristic features of the positron binding structure of some nitrile (–CN functional group) species such as acetonitrile, cyanoacetylene, acrylonitrile, and propionitrile are discussed with the configuration interaction scheme of multi-component molecular orbital calculations. This method can take the electron–positron correlation contribution into account through single electronic–single positronic excitation configurations. Our PA value of acetonitrile with the electronic 6-31++G(2df,2pd) and positronic [15s15p3d2f1g] basis set is calculated as 4.96 mhartree, which agrees to within 25% with the recent experimental value of 6.6 mhartree by Danielson et al. [Phys. Rev. Lett., 2010, 104, 233201]. Our PA values of acrylonitrile and propionitrile (5.70 and 6.04 mhartree) are the largest among these species, which is consistent with the relatively large dipole moments of the latter two systems.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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