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 synthe...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.展开更多
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)
文摘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.
