Nickel Schiff-base complexes immobilized on boehmite nanoparticles and their application in the oxidation of sulfides and oxidative coupling of thiols as novel and reusable nano organometal catalysts
Ni-complex-boehmite was prepared in water at room temperature using commercially available materials and applied as an efficient nanocatalyst in the oxidation of sulfides and thiols.
Vanadium (IV) complexes with Schiff base ligands derived from 2,3-diaminopyridine as catalyst for the oxidation of sulfides to sulfoxides with H2O2
作者:Abedien Zabardasti、Sayed Asad Shangaie
DOI:10.1007/s13738-018-1480-2
日期:2019.1
(IV) complexes with Schiff base ligands derivedfrom 2,3-diaminopyridine were used to as catalyst for the oxidation of sulfides to sulfoxides with H2O2. To the most of our information, there is not any literature description on the selective oxidation of sulfides to sulfoxides by means of a vanadium (IV) Schiff base complex with N, O donor ligand derivedfrom 2,3-diaminopyridine catalyst beneath these
亚砜是用于合成有价值的配合物和用作药物的物质。在适度的条件下,用冰醋酸作为催化剂,在溶剂的作用下,使用钒(IV)Schiff碱络合物,用(H 2 O 2)过氧化氢将硫化物选择性地氧化为相应的亚砜,生成适当的收率。为了将硫化物转化为各种催化剂的亚砜。必须注意的是,在我们之前的文章中,钒基络合物(VOY 1合成的)用作苯乙烯的环氧化催化剂(Zabardasti和Shangaie,J Iran Chem Soc 13:1875-1886,2016),但在新工作中,钒(IV)与具有2,3的席夫碱配体的配合物使用二氨基吡啶作为催化剂,将硫化物与H 2 O 2氧化为亚砜。据我们所知,没有关于在这些条件下通过钒(IV)Schiff碱与N,O供体配体衍生自2,3-二氨基吡啶催化剂的硫化物选择性氧化为亚砜的文献的描述。选择二甲基硫作为优化实验的图案底物。硫化物的氧化作用在25°C的温度下起作用,其中催化量的钒(IV)络合物或(VOY
Thermolysis of Alkyl Sulfoxides and Derivatives: A Comparison of Experiment and Theory
作者:Jerry W. Cubbage、Yushen Guo、Ryan D. McCulla、William S. Jenks
DOI:10.1021/jo0160625
日期:2001.12.1
Gas-phase activation data were obtained for model sulfoxide elimination reactions. The activation enthalpy for methyl 3-phenylpropyl sulfoxide is 32.9 +/- 0.9 kcal/mol. Elimination by methyl vinyl sulfoxide to form acetylene has an enthalpic barrier of 41.6 +/- 0.8 kcal/mol and that of 3-phenylpropyl methanesulfinate to form hydrocinnamaldehyde is 34.6 +/- 0.6 kcal/mol. Calculations at the MP2/6-311+G(3df
Synthesis and Characterization of 6-Ti-Substituted Polyoxomolybdate with High Catalytic Activity for Sulfide Oxidation
作者:Wenyu Wang、Zhen Jing、Yumei Hong、Xinyi Ma、Keli Li、Pengtao Ma、Jingyang Niu、Jingping Wang
DOI:10.1021/acs.inorgchem.3c04628
日期:2024.4.8
A 6-Ti-substituted polyoxometalate, (NH4)5Cs7Na3H2[Cs@(Ti2GeMo10O39)3]·34H2O (1), was synthesized by reacting (NH4)6Mo7O24·4H2O, GeO2, and TiOSO4 through the conventional aqueous method. Polyanion 1a is composed of three Ti2GeMo10} segments linked by Ti–O–Ti linkages and shows a trefoil-shaped structure. Furthermore, one Cs+ cation is encapsulated in the cavity of 1a. Notably, it possesses the highest
通过(NH 4 ) 6 Mo反应合成了6-Ti取代的多金属氧酸盐,(NH 4 ) 5 Cs 7 Na 3 H 2 [Cs@(Ti 2 GeMo 10 O 39 ) 3 ]·34H 2 O( 1 )。通过常规水法制备7 O 24 ·4H 2 O、GeO 2和TiOSO 4 。聚阴离子1a由三个通过Ti-O-Ti键连接的Ti 2 GeMo 10 }链段组成,并显示出三叶形结构。此外, 1a的空腔中封装有一个Cs +阳离子。值得注意的是,它在已报道的多钼酸盐中拥有最多数量的 Ti 中心。此外,作为高效多相催化剂, 1能够在20分钟内转化甲基苯基硫醚,得到96.4%的相应亚砜,且具有良好的可回收性。