CC-stretched formic acid: isomerisation, dimerisation, and carboxylic acid complexation.
CC-stretched formic acid: isomerisation, dimerisation, and carboxylic acid complexation.
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CC-拉伸甲酸:异构化、二聚化和羧酸络合
DOI:
10.1039/d1cp02700j
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Arman Nejad
中科院分区:
文献类型:
--
作者:
Katharina A. E. Meyer;Arman Nejad
The cis–trans-isomerism of the propiolic acid monomer (HCC–COOH) is examined with linear Raman jet spectroscopy, yielding the first environment-free vibrational band centres of a higher-energy cis-rotamer beyond formic acid (HCOOH) in addition to all fundamentals and a large number of hot and combination/overtone bands of the trans-conformer. Two near-isoenergetic trans-fundamentals of different symmetry (CCO bend and OH torsion) prove to be a sensitive benchmarking target, as their energetic order is susceptible to the choice of electronic structure method, basis set size, and inclusion of vibrational anharmonicity. For the infrared- and Raman-active CO stretching fundamentals of the cyclic (C2h) trans-propiolic acid dimer, resonance couplings are found that in part extend to the Cs-symmetric heterodimer of trans-propiolic and trans-formic acid. Exploratory vibrational perturbation theory (VPT2) calculations show that all perturbing states involve displacements of the OH moieties located on the doubly hydrogen bonded ring. The comparison of the infrared spectra of the propiolic acid dimer and its heterodimer with formic acid to that of several other carboxylic acid dimers from the literature reveals a notable similarity regarding a non-fundamental dimer band around 1800 cm−1, which in most cases is so far unassigned. VPT2 calculations and a simple harmonic model suggest an assignment to a combination vibration of the symmetric and antisymmetric OH torsion.
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DOI:
10.1063/1.5043400
发表时间:
2018-09
期刊:
The Journal of chemical physics
影响因子:
--
作者:
K. Meyer;M. Suhm
通讯作者:
K. Meyer;M. Suhm
影响因子:
8.4
作者:
K. Meyer;M. Suhm
通讯作者:
M. Suhm
DOI:
10.1039/c3cp51515j
发表时间:
2013
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
M. Suhm;F. Kollipost
通讯作者:
F. Kollipost
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
L. Khriachtchev
通讯作者:
L. Khriachtchev
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
Franz Kollipost
通讯作者:
Franz Kollipost