Microwave Spectrum of TeCS and Masses of the Stable Tellurium Isotopes

Abstract

The microwave spectrum of TeCS has been examined in the rotational transitions $J=6\mathrm{}\leftarrow 5$, $J=7\mathrm{}\leftarrow 6$, and $J=8\mathrm{}\leftarrow 7$. Seven isotopes were observed and from their absorption frequencies mass ratios have been calculated. The mass values are compared with mass spectrographic data and with the recent mass surfaces of Green. The odd-even mass variation is 1.5 milli-mass-units for both ${\mathrm{Te}}^{123}$ and ${\mathrm{Te}}^{125}$. The Te-C bond distance is 1.904 A and the C-S distance 1.557 A. The molecular dipole moment was measured as 0.172±0.002 Debye unit.