Synthesis, Crystal Structure, and Catalytic Properties of Novel Dioxidomolybdenum(VI) Complexes with Tridentate Schiff Base Ligands in the Biomimetic and Highly Selective Oxygenation of Alkenes and Sulfides

被引:49
|
作者
Rezaeifard, Abdolreza [1 ]
Sheikhshoaie, Iran [2 ]
Monadi, Niaz [1 ,2 ]
Stoeckli-Evans, Helen [3 ]
机构
[1] Univ Birjand, Fac Sci, Dept Chem, Catalysis Res Lab, Birjand 97179414, Iran
[2] Shahid Bahonar Univ Kerman, Fac Sci, Dept Chem, Kerman 76175133, Iran
[3] Univ Neuchatel, Inst Phys, CH-2009 Neuchatel, Switzerland
关键词
Molybdellum; Oxido ligands; Peroxides; Oxygenation; Schiff bases; Epoxidation; MANGANESE MESO-TETRAPHENYLPORPHYRIN; DIOXOMOLYBDENUM(VI) COMPLEXES; OLEFIN EPOXIDATION; TETRABUTYLAMMONIUM PEROXYMONOSULFATE; CIS-DIOXOMOLYBDENUM(VI) COMPLEXES; DIOXO COMPLEXES; MOLYBDENUM; OXIDATION; MONONUCLEAR; PERFORMANCE;
D O I
10.1002/ejic.200900814
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Four novel dioxidomolybdenum(VI) complexes [MoO2(L-x)-(CH3OH)] have been synthesized, using 2[(E)-(2-hydroxy-2-phenylethylimino)methyl]phenol derivatives as tridentate ONO donor Schiff base ligands (H2Lx) and MoO2(acac)(2). A monoclinic space group was determined by X-ray crystallography from single-crystal data of a sample of these new complexes. The epoxidation of alkenes by using tert-butyl hydroperoxide and oxidation of sulfides to sulfoxides by urea hydrogen peroxide were efficiently enhanced with excellent selectivity under the catalytic influence these new Mo-VI complexes. The high efficiency and relative stability of the catalysts have been observed by turnover numbers and UV/Vis investigations. The electron-poor and bulky ligands promoted the effectiveness of the catalysts.
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页码:799 / 806
页数:8
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