Catalytic performance of binary and ternary oxovanadium complexes of dipyridinyl-urea in (ep)oxidation of cis-cyclooctene and 1-octene

被引：46
作者：
Adam, Mohamed Shaker S. [1 ,2 ]
Hafez, Aly M. [1 ]
El-Ghamry, Ibrahim [1 ]
机构：
[1] King Faisal Univ, Coll Sci, Dept Chem, POB 380, Al Hufuf 31982, Al Hassa, Saudi Arabia
[2] Sohag Univ, Dept Chem, Fac Sci, Sohag 82534, Egypt
来源：
REACTION KINETICS MECHANISMS AND CATALYSIS | 2018年 / 124卷 / 02期
关键词：
Oxovanadium(IV); Dipyridinyl-urea; Catalysis; Oxidation; cis-Cyclooctene; 1-Octene; Organometallic-vanadium intermediate; SCHIFF-BASE COMPLEXES; CRYSTAL-STRUCTURE DETERMINATION; HYDROGEN-PEROXIDE; ZEOLITE-Y; OXIDATION; VANADIUM; EPOXIDATION; LIGAND; POTENTIALS; STYRENE;
D O I：
10.1007/s11144-018-1399-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Two novel ternary and binary mono-oxovanadium(IV) complexes of acetylacetonate (ac) and 1,3-dipyridin-2-yl-urea are synthesized, as VO(acac)(L) (1:1) and VO(L)(2) (1:2). They are characterized by various physico-chemical spectroscopic tools. The formation constants K (f) are calculated from the spectrophotometric measurements. The catalytic potential of VO(acac)(L) and VO(L)(2) has been examined in the (ep)oxidation of alkenes (cis-cyclooctene and 1-octene) by an aqueous hydrogen peroxide, H2O2, and tert-butyl hydroperoxide, TBHP. The effects of temperature, solvent and oxidant/alkene molar ratio are studied in order to get the optimized reaction conditions. Most of the catalytic (ep)oxidation products of cis-cyclooctene and 1-octene are determined qualitatively and quantitatively using gas chromatographic analysis. The increase of the catalyst amount to double time reduces the (ep)oxidation process time with improvement of the amount of the chemoselective epoxy product.
引用
收藏
页码：779 / 805
页数：27
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