The Microwave Spectrum of 4-Methylisothiazole

authored by

H. W. Nicolaisen, J. U. Grabow, N. Heineking, W. Stahl

Abstract

The microwave spectrum of 4-methylisothiazole was assigned by means of a pulsed molecular beam microwave Fourier transform spectrometer. Analysis of the spectrum yielded the rotational constants A = 7370.642(31) MHz, B = 2515.8461 (30) MHz, C= 1897.2863(33) MHz, a threefold barrier to internal rotation of the methyl group of V3= 3170.81 (130) GHz = 105.7669(430) cm 1, a momentum of inertia of the methyl group of Ia = 3.16769 (130) amu • Å2and an angle between internal rotor axis and principal a-axis of (Θ = 5.406(38)°. The nitrogen quadrupole coupling constants were determined to be %+ = %bb + %cc —1-4822(14) MHz, % — %bb~Xcc= -14353(25) MHz and zah= -3.16(12) MHz.

Organisation(s)

Institute of Physical Chemistry and Electrochemistry

External Organisation(s)

Kiel University

Type

Article

Journal

Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences

Volume

46

Pages

635-638

No. of pages

4

ISSN

0932-0784

Publication date

01.07.1991

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Mathematical Physics, General Physics and Astronomy, Physical and Theoretical Chemistry

Electronic version(s)

https://doi.org/10.1515/zna-1991-0714 (Access: Open)