期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 116, 期 9, 页码 2101-2108出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp209714e
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资金
- Finnish Center of Excellence in Computational Molecular Science
- Research Foundation of the University of Helsinki
We report on the first experimental observation of formic acid dimers composed of two molecules of the higher-energy cis conformer. The cis-cis formic acid dimers are prepared in an argon matrix by selective vibrational excitation of the ground state trans conformer (deuterated form HCOOD) combined with thermal annealing of the matrix at about 30 K. Five cis-cis formic acid dimers are predicted by ab initio calculations (interaction energies from -16.9 to -27.2 kJ mol(-1)), and these structures are used for the assignment of the experimental spectra. Selective vibrational excitation of the obtained cis-cis dimers leads to the formation of several trans-cis dimers, which supports the proposed assignments.
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