Microwave spectra of two conformers of the (1R)-(–)-nopol monomer
Microwave spectra of two conformers of the (1R)-(–)-nopol monomer
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(1R)-(-)-nopol单体的两种构象异构体的微波谱
DOI:
10.1016/j.jms.2022.111705
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发表时间:
2022
影响因子:
1.4
通讯作者:
Grubbs, Garry S
中科院分区:
文献类型:
--
作者:
Sedo, Galen;Duerden, Amanda;Marshall, Frank E.;Moon, Nicole T.;Grubbs, Garry S
The rotational spectrum of the (1R)-(-)-nopol monomer has been observed in the 6–18 GHz region using CP-FTMW spectroscopy. Transitions of two distinct conformers of the parent isotopologue have been observed and assigned. Density Functional Theory (DFT) calculations performed on the monomer predict nine distinct low-energy heavy atom geometries. The differences between these structures are attributed to changes in the orientation of two dihedral angles in the heavy atom R-CH2CH2OH functionalization, where R refers to the fixed bicyclic cage component of the molecule. Further optimization of these geometries found 27 distinct conformers associated with the hydroxyl hydrogen orientation. The rotational constants of the two lowest energy conformers were found to be in good agreement with the experimental constants of the two observed conformers and the predicted dipole moment components agree with the relative intensities of the observed transitions.
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影响因子:
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