Acid-base properties and stability of sulfoxylic acid in aqueous solutions
摘要:
A comparative study of decomposition of sulfoxylic acid S(OH)(2) and sulfoxylate anion and their reactions with formaldehyde in aqueous solutions with different acidity was carried out. Using the obtained results, the pK(1) value of S(OH)(2) was determined for the first time.
Thiourea dioxide promoted efficient organocatalytic one-pot synthesis of a library of novel heterocyclic compounds
作者:Sanny Verma、Subodh Kumar、Suman L. Jain、Bir Sain
DOI:10.1039/c1ob05818e
日期:——
The utility of thiourea dioxide as an efficient organocatalyst for the library synthesis of novel heterocyclic compoundsvia one-pot multicomponent coupling reactions is disclosed. Thiourea dioxide is an inexpensive and readily accessible catalyst, resulting in better product yields as compared to the corresponding thiourea as catalyst. Thiourea dioxide is found to be insoluble in various organic solvents and therefore at the end of the reaction products can be separated by extraction with diethyl ether and the recovered catalyst can be used several times with consistent catalytic activity.
Thiourea, A convenient reagent for the reductive cleavage of olefin ozonolysis products
作者:Deepa Gupta、Raghavan Soman、Sukh Dev
DOI:10.1016/0040-4020(82)80187-7
日期:1982.1
A convenient procedure for the preparation of aldehydes, in good to excellent yields, from suitable olefins by ozonolysis in methanol, followed by exposure of the resulting products to thiourea, is described.
作者:S. V. Makarov、E. V. Kudrik、I. N. Terskaya、K. A. Davydov
DOI:10.1007/s11176-005-0015-6
日期:2004.9
The reaction mechanism of thiourea dioxides with ammonia and primary aliphatic amines involves direct nucleophile (ammonia or amine) reactions with thiourea dioxides, followed by dissociation of the resulting adduct to form the sulfoxylate ion.
Kinetic Evidence of Tautomerism of Thiourea Dioxide in Aqueous Acidic Solutions
作者:György Csekő、Ying Hu、Yanan Song、Tímea R. Kégl、Qingyu Gao、Sergei V. Makarov、Attila K. Horváth
DOI:10.1002/ejic.201400059
日期:2014.4
Indirect experimental evidence of the existence of a sluggish tautomerism of thiourea dioxide in acidic aqueoussolution was discovered while studying its oxidation by chlorine dioxide. Thiourea dioxide slowly rearranges into aminoiminomethanesulfinic acid, but the reactivity of these two species towards chlorine dioxide marginally differs. It was clearly demonstrated that thiourea dioxide reacts with
Structural Investigation of Thiourea Dioxide in Superacids
作者:Dominik Leitz、Alexander Nitzer、Yvonne Morgenstern、Florian Zischka、Andreas J. Kornath
DOI:10.1002/ejic.201801298
日期:2019.2.14
In this study a vibrational spectroscopic investigation of thiourea dioxide [(H2N)2CSO2] in the superacidic systems XF/MF5 (X = H, D; M = As, Sb) as well as HF/GeF4 is presented. The formed salts [(X2N)2CS(OX)2]2+2[MF6]– are characterized by low temperature vibrational spectroscopy. In the case of 2[(H2N)2CS(OH)2]2+[Ge4F20]4–·4HF a single‐crystal X‐ray structure is reported. The salt crystallizes in
在这项研究中,振动光谱研究了超酸性体系X F / M F 5(X = H,D; M = As,Sb)以及HF / GeF 4中的二氧化硫脲[(H 2 N)2 CSO 2 ]。被表达。形成的盐[(X 2 N)2 CS(O X)2 ] 2+ 2 [ M F 6 ] –通过低温振动光谱法表征。在2 [(H 2 N)2 CS(OH)2的情况下] 2+ [Ge 4 F 20 ] 4– · 4HF报告了单晶X射线结构。盐在三斜晶系空间群P 1中结晶,每单位晶胞具有一个公式单位。在理论水平PBE1PBE / 6-311G ++(3df,3pd)上讨论了结果以及量子化学计算。