https://www.selleckchem.com/pr....oducts/i-bet-762.htm
The acidity of acetylene CH is stronger than that of alkane CH, and the attractive interaction between an acetylene CH with π-electrons, which shows a clear hydrogen bond property, is called activated CH/π interaction. In this study, cooperative enhancement of the activated CH/π interaction has been probed through the cluster size dependence of the red shift of the acetylene CH stretching vibrational band in neutral phenol-(acetylene)n (∼16 ≤ n ≤ ∼3 and (acetylene)n+ (10 ≤ n ≤ 7. In both the clusters, the characteristic asymmetric
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