## Abstract

Microwave and radio frequency spectra of ArSO_{3} and radio frequency spectra of N_{2}SO_{3} are measured by molecular beam electric resonance spectroscopy. Both complexes are symmetric rotors. The spectroscopic constants determined for Ar^{32}SO^{3} are B = 1449.089(5) MHz, D_{J} = 3.6(6) kHz, and μ = 0.2676(3) D. For Ar ^{34}SO_{3}, B = 1439.090(5) MHz. The stretching frequency of the weak Ar-S bond is 61.(5) cm^{-1}, and the force constant is thus 0.059(10) mdyn/Å. The Ar-S bond length in ArSO_{3} is 3.350(1) Å. The Ar-S-O angle is found to be 90.5°(5), thereby indicating no significant out-of-plane distortion of the SO_{3} moiety. Preliminary assignment of the N_{2}SO_{3} spectrum yields a dipole moment of 0.46(1) D. Electric deflection studies show that (SO_{3})_{2} and (SO_{3})_{3} are polar species, while Xe_{2}SO _{3} is not.

Original language | English (US) |
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Pages (from-to) | 137-141 |

Number of pages | 5 |

Journal | The Journal of Chemical Physics |

Volume | 73 |

Issue number | 1 |

DOIs | |

State | Published - Jan 1 1980 |