Microwave Detection of Sulfoxylic Acid (HOSOH)

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• 作者：Kyle N. Crabtree ; Oscar Martinez ; Jr. ; Lou Barreau ; Sven Thorwirth ; Michael C. McCarthy
• 刊名：The Journal of Physical Chemistry A
• 出版年：2013
• 出版时间：May 2, 2013
• 年：2013
• 卷：117
• 期：17
• 页码：3608-3613
• 全文大小：301K
• 年卷期：v.117,no.17(May 2, 2013)
• ISSN：1520-5215

文摘

Sulfoxylic acid (HOSOH), a chemical intermediate roughly midway along the path between highly reduced (H₂S) and highly oxidized sulfur (H₂SO₄), has been detected using Fourier transform microwave spectroscopy and double resonance techniques, guided by new high-level CCSD(T) quantum-chemical calculations of its molecular structure. Rotational spectra of the two most stable isomers of HOSOH, the putative ground state with C₂ symmetry and the low-lying C_s rotamer, have been measured to high precision up to 71 GHz, allowing accurate spectroscopic parameters to be derived for both isomers. HOSOH may play a role in atmospheric and interstellar chemistry, and the present work provides the essential data to enable remote sensing and/or radioastronomical searches for these species. Spectroscopic characterization of HOSOH suggests that other transient intermediates in the oxidation of SO₂ to H₂SO₄ may be amenable to laboratory detection as well.