Journal
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
Volume 4, Issue 3, Pages 426-434Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ct700325c
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The polarizabilities of fifty methanol clusters (CH3OH)(n), n = 1 to 12, were calculated at the B3LYP/6-311++G** level of theory and partitioned into molecular contributions using the Hirshfeld-1 method. The resulting molecular polarizabilities were found to be determined by the polarizabilities of the two parts of the molecule, the hydrophilic hydroxyl group and the hydrophobic methyl group, each exhibiting a different dependency upon the local environment. The polarizability of the hydroxyl group was found to be dependent on the number, type, and strength of the hydrogen bonds a methanol molecule makes, whereas the polarizability of the methyl groups is mostly influenced by sterical hindrance. The findings were compared with the results obtained in a previous study on water clusters. The influence of the BSSE correction was investigated and found to increase polarizability values by up to 8.5%.
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