The multinuclear cobaloxime complexes-based catalysts for direct synthesis of cyclic carbonate from of epichlorohydrin using carbon dioxide: Synthesis and characterization
详细信息 查看全文
- 作者：Ahmet Kilic ; Mahmut Ulusoy ; Mustafa Durgun ; Emine Aytar
- 关键词：Dicobaloxime ; Organodicobaloxime ; Spectroscopy ; Carbon dioxide ; Cyclic carbonate
- 刊名：Inorganica Chimica Acta
- 出版年：24 February, 2014
- 年：2014
- 卷：411
- 期：Complete
- 页码：17-25
- 全文大小：1104 K
文摘
The novel examples of dicobaloxime [(dmgH)2ClCo-(4,4鈥?bpy)-CoCl(dmgH)2] (1), organodicobaloxime [(dmgH)2PhCH2Co-(4,4鈥?bpy)-CoCH2Ph(dmgH)2] (2), and the intramolecular hydrogen (O-H鈰疧) bridges were replaced Cu(II) containing multinuclear cobaloxime complexes [{dmgCu(NN)}2ClCo-(4,4鈥?bpy)-CoCl{dmgCu(N鈥擭)}2](ClO4)4 (3-9) were synthesized, characterized and used in direct synthesis cyclic carbonates from carbon dioxide and various epoxides. The dicobaloxime complex (1) was used as precursors for building the intramolecular hydrogen (O-H鈰疧) bridges replaced Cu(II) ions containing complexes (3-9). All of compounds have been characterized by 1H and 13C NMR spectra, FT-IR spectra, UV-Vis spectra, elemental analysis, melting point measurements, LC-MS spectra, molar conductivity measurements, and magnetic susceptibility techniques. Among the nine metal complexes, complex (2) (bearing cobalt-carbon bound) displayed the higher catalytic efficient than other complexes (1 and 3-9) under the same catalytic conditions. The intramolecular hydrogen (O-H鈰疧) bridges were replaced Cu(II) containing complexes (3-9) that bear the dimethyl glyoximate ligands and linked ligands exhibited much lower catalytic efficiencies as compared with complexes (1) and (2).