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首页> 外文期刊>Journal of industrial and engineering chemistry >Mono/multinuclear cobaloxime and organocobaloxime-catalyzed conversion of CO2 and epoxides to cyclic organic carbonates: Synthesis and characterization
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Mono/multinuclear cobaloxime and organocobaloxime-catalyzed conversion of CO2 and epoxides to cyclic organic carbonates: Synthesis and characterization

机译：单/多核钴氧肟和有机钴氧肟催化的CO2和环氧化物转化为环状有机碳酸酯的合成和表征

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摘要

The synthesis and characterization of the mono- and multinuclear cobaloxime and organocobaloxime complexes bearing bidentate dimethyl glyoxime ligands are presented. All mono- and multinuclear cobaloxime and organocobaloxime complexes are used as catalysts for the cycloaddition of CO2 to various epoxides, especially epichlorohydrin, in the presence of 4-dimethylamino pyridine (DMAP) as a cocatalyst. In the catalytic applications, DMAP was a more active base with higher yield compared to other Lewis bases. Complexes (I) and (3), which have two dimethyl glyoxime per cobalt center (mononuclear complexes), are better catalytic systems than the corresponding multinuclear cobaloxime and organocobaloxime complexes (2-5) and (7-10) with two dimethyl glyoxime per cobalt center and one linked ligands per copper center. In addition, the organocobaloxime complex (6) showed the highest activity for the cycloaddition of CO2 with epichlorohydrin in the presence of 4-dimethylamino pyridine (DMAP) as cocatalyst. The used as catalysts mono- and multinuclear cobaloxime and organocobaloxime complexes were characterized by H-1 and C-13 NMR spectra, FT-IR spectra, UV-vis spectra, LC-MS spectra, molar conductivity measurements, melting point measurements and magnetic susceptibility measurements. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
机译：介绍了带有双齿二甲基乙二肟配体的单核和多核钴肟和有机钴肟配合物的合成和表征。在4-二甲基氨基吡啶（DMAP）作为助催化剂的情况下，所有单核和多核钴肟和有机钴肟配合物均用作催化剂，将CO2环化成各种环氧化物，尤其是环氧氯丙烷。在催化应用中，与其他路易斯碱相比，DMAP是一种活性更高，产率更高的碱。每个钴中心具有两个二甲基乙二肟的配合物（I）和（3）（单核配合物）比相应的多核钴肟和有机钴肟配合物（2-5）和（7-10）具有两个二甲基乙二肟的催化体系更好。钴中心和每个铜中心有一个连接的配体。另外，在4-二甲基氨基吡啶（DMAP）作为助催化剂存在下，有机钴肟配合物（6）对环氧乙烷与环氧氯丙烷的环加成反应具有最高的活性。通过H-1和C-13 NMR光谱，FT-IR光谱，UV-vis光谱，LC-MS光谱，摩尔电导率测量，熔点测量和磁化率表征用作单核和多核钴肟和有机钴肟配合物的催化剂测量。 （C）2014韩国工业和工程化学学会。由Elsevier B.V.发布。保留所有权利。

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