Catalytic Efficacy of Copper(II)- and Cobalt(III)-Schiff Base Complexes in Alkene Epoxidation

被引：7

作者：

Maiti, Monami ^{[1
]}

Sadhukhan, Dipali ^{[1
]}

Thakurta, Santarupa ^{[1
]}

Zangrando, Ennio ^{[2
]}

Pilet, Guillaume ^{[3
]}

Signorella, Sandra ^{[4
]}

Bellu, Sebastian ^{[4
]}

Mitra, Samiran ^{[1
]}

机构：

[1] Jadavpur Univ, Dept Chem, Kolkata 700032, India

[2] Dept Chem & Pharmaceut Sci, I-34127 Trieste, Italy

[3] Univ Lyon 1, Grp Crystallog & Ingn Mol, Lab Multimat & Interfaces, UMR CNRS 5615, F-69622 Villeurbanne, France

[4] Univ Nacl Rosario, Inst Quim Rosario IQUIR, CONICET, Fac Ciencias Bioquim & Farmaceut, RA-2000 Rosario, Santa Fe, Argentina

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2014年 / 87卷 / 06期

关键词：

X-RAY-STRUCTURE; SCHIFF-BASE; CRYSTAL-STRUCTURE; STACKING INTERACTIONS; MAGNETIC-PROPERTIES; CU-II; OXIDATION; OLEFINS; LIGAND; MANGANESE(III);

D O I：

10.1246/bcsj.20130334

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A potentially hexadentate N2O4 donor Schiff base ligand N,N'-bis(5-bromo-3-methoxysalicylideneimino)-1,3-diaminopropane (H2L1) has been used to synthesize two mononuclear coordination complexes [Cu(L-1)]center dot H2O (1) and [Co(L-1)(HL2)]ClO4 center dot CH3CN (2). The cobalt complex is a unique mixed-ligand species comprising both the di- and mono-condensed ligands; the latter (HL2) resulted from in situ hydrolytic cleavage of H2L1. Ligand L-1 assumes a planar arrangement in 1 and a folded beta-cis configuration in 2, induced in this case by the chelating HL2 ligand. The complexes are characterized by elemental analyses, FT-IR, and UV-vis spectral methods, and their structures are established by single-crystal X-ray diffraction study. Both the complexes are proven to be efficient catalysts for the epoxidation of alkenes by H2O2 or PhIO. The efficiency of alkene epoxidation is however somewhat superior with PhIO, and in each case, 2 appears to be a slightly better catalyst than 1.

引用

页码：724 / 732

页数：9