Hydrolysis of <i>N-</i>Phenylalkanesulfinamides in Aqueous Mineral Acids
作者:Mrityunjoy Datta、Alan J. Buglass、John G. Tillett
DOI:10.1080/10426507.2010.508691
日期:2011.2.28
acid-catalyzed hydrolysis of N-phenylalkanesulfinamides (RSONHPh; 1, R = iPr; 2, R = tBu; 3, R = 1-adamantyl) has been studied in aqueous mineral acids. Hydrolysis was found to proceed via a slow spontaneous (uncatalyzed) pathway, an A-2 (bimolecular) acid-catalysis pathway, and an acid-dependent nucleophilic catalysis pathway, the last of which predominates in hydrobromic and hydrochloric acid solutions
摘要 在含水无机酸中研究了 N-苯基链烷亚磺酰胺 (RSONHPh; 1, R = iPr; 2, R = tBu; 3, R = 1-金刚烷基) 的酸催化水解。发现水解通过缓慢的自发(未催化)途径、A-2(双分子)酸催化途径和酸依赖性亲核催化途径进行,最后一种在氢溴酸和盐酸溶液中占主导地位。在浓硫酸中检测到化合物 2 和 3 从 A-2 到 A-1 的机械转换。催化活性的顺序、添加盐的影响、Arrhenius 参数、动力学溶剂同位素和溶剂效应都与所提出的机制一致。图形概要
Mannich-type condensation products of sulfinic acids with aldehydes and hydroxylamines or hydroxamic acids
作者:G. Rawson、J.B.F.N. Engberts
DOI:10.1016/s0040-4020(01)98774-5
日期:1970.1
Hydroxylamine and some of its derivatives, including hydroxamic acids, have been used as the amine component in Mannich-type condensation reactions with aldehydes and sulfinic acids or thiols. The condensationproducts have been oxidized to the corresponding nitroxides. The ESR spectra of these nitroxides are reported and interpreted in terms of the structure of these radicals. In several cases the
A silver-(conjugated compound) composite comprising silver particles having a number-average Feret diameter of not more than 1,000 nm, and a conjugated compound having a weight-average molecular weight of not less than 3.0×102 adsorbed to the silver particles. The composite exhibits excellent conductivity and charge injection properties, and excellent dispersibility within non-polar solvents
A silver-(conjugated compound) composite comprising silver particles having a number-average Feret diameter of not more than 1,000 nm, and a conjugated compound having a weight-average molecular weight of not less than 3.0×10
2
adsorbed to the silver particles. The composite exhibits excellent conductivity and charge injection properties, and excellent dispersibility within non-polar solvents.