Abstract
Ab initio calculations at MP2/6-311++G(d,p) computational level were used to analyze the interaction between a molecule of the hydroperoxyl radical with 1 up to 4 molecules of ammonia. Three minima were found for 1:2 and 1:4 complexes of HOO and NH3. Two complexes were located as minima on the potential energy surface of 1:3 complexes. Red shifts of the OH stretching frequency upon complex formation in the range between 560 and 1,116 cm−1 are predicted. Cooperative effect in terms of stabilization energy is calculated for the studied clusters. The cooperative effect is increased with the increasing size of studied clusters. The Quantum Theory Atoms in Molecules (QTAIM) theory was also applied to explain the nature of the complexes.
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