First observation of a dihydrogen bond involving the Si-H group in phenol-diethylmethylsilane clusters by infrared-ultraviolet double-resonance spectroscopy
H. Ishikawa, A. Saito, M. Sugiyama, and N. Mikami,
J. Chem. Phys.
123,
224309
(2005).
We have experimentally identified a dihydrogen bond involving
the Si-H group in phenol-diethylmethylsilane (DEMS) clusters for the first time
by IR-UV double-resonance spectroscopy. Vibrational shifts to lower frequency of
21-29 cm-1 were found for the OH stretching vibration of three isomers of
the phenol-DEMS clusters. Spectral simulations based on the MP2 calculations also
support our observation. In addition to these clusters, dihydrogen bonds were also
observed in the phenol-H2O-DEMS and (phenol)2-DEMS clusters,
which exhibited much stronger interactions than the phenol-DEMS clusters.