Successive Hydrogenation of SO and SO2 in Solid para-H2: Formation of Elusive Small Oxoacids of Sulfur,ACS Earth and Space Chemistry

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Successive Hydrogenation of SO and SO2 in Solid para-H2: Formation of Elusive Small Oxoacids of Sulfur
ACS Earth and Space Chemistry ( IF 2.9 ) Pub Date : 2021-04-20 , DOI: 10.1021/acsearthspacechem.1c00043
Sándor Góbi ₁ , István Pál Csonka ₁ , Gábor Bazsó ₂ , György Tarczay _{1,

3}

Affiliation

The small oxoacids of sulfur (SOS), H_xSO_y (x, y = 1, 2), are considered to be key reactive intermediates in organic synthesis, biochemical processes, and atmospheric chemistry. They play a major role in the chemistry of S-rich planets and are likely present in the interstellar medium (ISM). To shed light on the processes in the ISM, the reactions of SO₂ and sulfur monoxide (SO) with H atoms were studied at 3.1 K in a para-H₂ quantum-solid host. In the case of SO, the formation of both HOS and hydroxysulfinyl (HSO) was observed. Although hydroxidooxidosulfur (HOSO) is more favored thermodynamically, HSO₂ is more readily formed from SO₂ due to kinetic (tunneling) control. Regarding the doubly hydrogenated species, sulfoxylic acid (S(OH)₂), sulfinic acid (HS(O)OH), and tentatively dihydrogen sulfone (H₂SO₂) were identified among the products by IR spectroscopy. HOS and H₂SO₂ were observed for the first time, while the present IR spectroscopic data can contribute to the identification of SOS in the atmosphere of celestial bodies, e.g., Venus, Europa, or Io.

中文翻译：

固体对位H ₂中SO和SO _2的连续加氢：难以捉摸的硫的小含氧酸的形成

硫的含氧酸小（SOS），H _X SO _Ý（X，ÿ = 1，2），被认为是在有机合成，生物化学过程，与大气化学键的反应性中间体。它们在富含S的行星的化学过程中起着重要作用，并且可能存在于星际介质（ISM）中。为了阐明ISM中的过程，研究了SO ₂和一氧化硫（SO）与H原子在对-H ₂量子固体基质中在3.1 K下的反应。在使用SO的情况下，观察到了HOS和羟基亚磺酰基（HSO）的形成。尽管热力学上更喜欢使用羟基氧化硫（HOSO），但HSO ₂由于动力学（隧穿）控制，SO ₂更容易由SO ₂形成。关于双氢化物，通过红外光谱法在产物中鉴定出亚硫酸（S（OH）₂），亚磺酸（HS（O）OH）和暂定二氢砜（H ₂ SO ₂）。首次观察到HOS和H ₂ SO ₂，而当前的红外光谱数据可以帮助识别天体大气（例如，金星，欧罗巴或艾奥）中的SOS。

更新日期：2021-05-20

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