Gas-Phase Acidities of Nine Sulfur Oxoacids of Composition [H2,S,On] (n = 1–4)

Microwave Detection of Sulfoxylic Acid (HOSOH)

“…Owing to the strong c-type spectrum for the C s isomer, many more lines have been detected compared to the C 2 isomer. In total, 23 rotational transitions were measured (Table 4); of the observed transitions, 13 were measured with FTM spectroscopy, and the other 10 were measured with DR. The total rms of the deviations between fitted frequencies and measured frequencies is 6.9 kHz, but this number cannot be directly compared with the FTM uncertainty as it contains DR measurements, which have greater uncertainty (discussed further below).…”

“…H 2 SO 2 and its isomers have been extensively studied by ab initio theory. ,− The consensus that has emerged from these calculations is that the lowest-energy structure is sulfoxylic acid (HOSOH) with C 2 symmetry, followed by another sulfoxylic acid rotamer with C s symmetry, which lies only slightly higher in energy (∼1.3 kcal mol –1 ). Other structures are calculated to be minima on the potential energy surface but are considerably higher in energy; several of these are illustrated in Figure .…”

Alternative Conceptions of Common Salt Hydrolysis Among Upper-Secondary-School Students

“…The equations for the reaction of the sulfite anion with water included the formation of sulfurous acid (50%), a hydrogen sulfite anion (24%), sulfur dioxide SO 2 (19%), and -. When considering these products, it should be noted that sulfurous acid is unstable and decomposes into H 2 O and SO 2 (Otto & Steudel, 2000;Voegele, Tautermann, Rauch, Loerting, & Liedl, 2004). This fact was used by students who wrote sulfur dioxide as the product in the form of SO 2 or .…”

“…However, this notation is, strictly speaking, incorrect. It is used to demonstrate that two tautomeric forms of sulfurous acid are present in an aqueous solution, H-S(=O) 2 OH and SO(OH) 2 , as well as their ions, HSO 3 and SO 2 OH -, respectively (Otto & Steudel, 2000;Steudel & Steudel, 2009). However, the existence and stability of these molecules are not considered at the upper-secondary-school level, so this was most certainly not the students' intention.…”