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Shapes and Internal Dynamics of the 1:1 Adducts of Ammonia with trans and gauche Ethanol: A Rotational Study
Author(s) -
Giuliano Barbara M.,
Favero Laura B.,
Maris Assimo,
Caminati Walther
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201664
Subject(s) - conformational isomerism , chemistry , ethanol , adduct , ammonia , rotational spectroscopy , gauche effect , spectroscopy , spectral line , quantum tunnelling , internal rotation , crystallography , physics , condensed matter physics , molecule , organic chemistry , mechanical engineering , quantum mechanics , astronomy , engineering , medicine , surgery
Two 1:1 adducts of ammonia with ethanol have been characterized by using pulsed‐jet FT microwave spectroscopy. They are formed with two different ( trans and gauche ), stable conformers of ethanol. Several internal‐dynamics effects are reflected in the features of the rotational spectra. The trans complex shows the tunneling effects owing to internal rotation of both ammonia and the methyl group. The rotational transitions of the gauche species exhibit a small splitting that is related to tunneling through the potential‐energy barrier between the two equivalent minima.