A Defective Linear Pentachromium Complex for the Enhanced Catalysis of the Cycloaddition of CO2 with Propylene Oxide  

A Defective Linear Pentachromium Complex for the Enhanced Catalysis of the Cycloaddition of CO_2 with Propylene Oxide

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作  者:王文珍 蔺伟 李磊磊 刘双 拉亚特伊斯梅洛夫 李锦祥 彭旭明 

机构地区:[1]School of Chemistry and Chemical Engineering,Xi'an Shiyou University [2]Institute of Chemical Problems of Azerbaijian Academy of Sciences [3]Department of Chemistry,National Taiwan University

出  处:《Chinese Journal of Structural Chemistry》2018年第8期1305-1312,共8页结构化学(英文)

基  金:supported by the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.17JK0606);the Scientific Research Program Funded by Shaanxi Provincial Education Department(No.16JK1598);the Xi’an Shiyou University Postgraduate Innovation and Practical Ability Training Project(No.YCS16212073)

摘  要:Based on the ligand(2,7-bis(α-pyrimidylamino)-1,8-naphthyridine(H2 bpmany)), a linear pentachromium complex [Cr5(μ5-bpmany)4Cl2]PF6(1, μ5-bpmany = 2,7-bis(a-pyrimidylamino)-1,8-naphthyridine) was synthesized. The crystal structure of compound 1 has been characterized by X-ray crystallography. Interestingly, one metal atom in the center is missing in this linear chain, leading to the defective pentachromium metal string structure which is similar with the reported complex [Cr5(μ5-dpznda)4Cl2](2, dpznda = N^2,N^7-di(pyrazin-2-yl)-1,8-naphthyridine-2,7-diamine). The central Cr(Ⅲ) ion of 1 is eight-coordinated and is also rare in the chromium complex. The reaction of carbon dioxide with propylene oxide that generates propylene carbonate(PC) when catalyzed by [Cr5(μ5-bpmany)4Cl2]PF6 was investigated. Different reaction conditions including temperature and pressure were studied to optimize the reaction conditions.Based on the ligand(2,7-bis(α-pyrimidylamino)-1,8-naphthyridine(H2 bpmany)), a linear pentachromium complex [Cr5(μ5-bpmany)4Cl2]PF6(1, μ5-bpmany = 2,7-bis(a-pyrimidylamino)-1,8-naphthyridine) was synthesized. The crystal structure of compound 1 has been characterized by X-ray crystallography. Interestingly, one metal atom in the center is missing in this linear chain, leading to the defective pentachromium metal string structure which is similar with the reported complex [Cr5(μ5-dpznda)4Cl2](2, dpznda = N^2,N^7-di(pyrazin-2-yl)-1,8-naphthyridine-2,7-diamine). The central Cr(Ⅲ) ion of 1 is eight-coordinated and is also rare in the chromium complex. The reaction of carbon dioxide with propylene oxide that generates propylene carbonate(PC) when catalyzed by [Cr5(μ5-bpmany)4Cl2]PF6 was investigated. Different reaction conditions including temperature and pressure were studied to optimize the reaction conditions.

关 键 词:metal string complex pentachromium(Ⅲ) complex extended metal atomic chain 

分 类 号:O621.251[理学—有机化学]

 

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