Blue-Shifted Hydrogen Bonding in the Gas Phase CH/D3 CN···HCCl3 Complexes

The Journal of Physical Chemistry. a
B Behera, Puspendu K Das

Abstract

Blue-shifting H-bonded complexes between CHCl3 and CH/D3CN have been identified by Fourier transform infrared spectroscopy in the gas phase at room temperature. The change in FTIR peak intensity of the mixture of the two components as a function of temperature and composition provides the basis for identification of the H-bonded band in the infrared spectrum. On complex formation with CH3CN and CD3CN, the C-H stretching frequency of CHCl3 shifts to the blue by +8.7 and +8.6 cm-1, respectively. The molecular electrostatic potential calculation at the MP2/6-311++G** level has been used to arrive at the geometry of the complex. It has been reported in the literature that CHCl3 and CH/D3CN form red-shifting H-bonded complex in Ar matrix. The red shifting has been verified by doing ab initio calculations in the presence of Ar atoms, which has been attributed to the matrix effect at low temperature. The interaction of Ar with CH3CN makes the CH3CN more basic and as a result it becomes better hydrogen bond acceptor and causes red shift. The potential energy scans and NBO analysis of the Cl3CH···NCCH3 complex have been compared with those of F3CH···NCCH3 and Cl3CH···NH3 complexes. The change in electron density of the CHCl3 as a functi...Continue Reading

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Citations

Sep 3, 2020·The Journal of Chemical Physics·Maximiliano Inafuku, Ernesto Marceca
Apr 21, 2021·Physical Chemistry Chemical Physics : PCCP·Nandan KumarG Narahari Sastry
May 24, 2019·The Journal of Physical Chemistry. a·Sankhabrata ChandraAtanu Bhattacharya
Jun 27, 2019·The Journal of Physical Chemistry Letters·Yuezhi Mao, Martin Head-Gordon
Nov 25, 2021·The Journal of Physical Chemistry. a·Nguyen Thi Thanh CucVu Thi Ngan

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