The rotational spectra of five isotopologues of dimethyl sulfate have been assigned by pulsed-jet Fouriertransform microwave spectroscopy. The global minimum configuration has a C2 symmetry, with the two methyl groups nearly trans with respect to the two sulfonic oxygen atoms. The internal rotations of the two methyl groups split each transition into several components line, allowing for the determination of accurate values of the V3 barrier height to internal rotation and of the orientation of the methyl groups with respect to the principal axis system. The geometry of the molecular skeleton is fully determined.
Conformation and internal motions of dimethyl sulfate: A microwave spectroscopy study / L.B.Favero; L.Evangelisti; G.Feng; L.Spada; W.Caminati. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - STAMPA. - 517:(2011), pp. 139-142. [10.1016/j.cplett.2011.10.021]
Conformation and internal motions of dimethyl sulfate: A microwave spectroscopy study
EVANGELISTI, LUCA;FENG, GANG;SPADA, LORENZO;CAMINATI, WALTHER
2011
Abstract
The rotational spectra of five isotopologues of dimethyl sulfate have been assigned by pulsed-jet Fouriertransform microwave spectroscopy. The global minimum configuration has a C2 symmetry, with the two methyl groups nearly trans with respect to the two sulfonic oxygen atoms. The internal rotations of the two methyl groups split each transition into several components line, allowing for the determination of accurate values of the V3 barrier height to internal rotation and of the orientation of the methyl groups with respect to the principal axis system. The geometry of the molecular skeleton is fully determined.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
