Potential energy surfaces and Jahn-Teller effect on CH4⋯NO complexes

Abstract

The potential energy surface of the CH4¯NO van der Waals complexes was explored at the RCCSD T/aug-cc-pVTZ level including the full counterpoise correction to the basis set superposition error. The Jahn-Teller distortion of the C3v configurations for the CH bonded and CH3 face complexes was analyzed. From this distortion, two A and A adiabatic surfaces were considered. The estimated zero point energy of Cs configurations is above the barrier of the C3v ones. Therefore, the CH3 face complexes are dynamic Jahn-Teller systems. The D0 140 cm−1 for A state and 100 cm−1 for A values obtained are in good agreement with the experimental values