Synthesis and Structure of Binuclear O/S-Bridged Organobismuth Complexes and Their Cooperative Catalytic Effect on CO2 Fixation
作者:Renhua Qiu、Zhengong Meng、Shuangfeng Yin、Xingxing Song、Nianyuan Tan、Yongbo Zhou、Kun Yu、Xinhua Xu、Shenglian Luo、Chak-Tong Au、Wai-Yeung Wong
DOI:10.1002/cplu.201200030
日期:2012.5
which are mononuclear organobismuth complexes, the binuclear organobismuth complexes show higher cooperative catalytic effect. However, the complexes with an oxygen bridge (1–3) are not stable in air and lose their catalytic efficiency because of hydrolysis or CO2 adsorption (forming organobismuth carbonates in the latter case). Nonetheless, the binuclear organobismuth complexes (4–6) with a sulfur bridge
在双核配合物的有机铋(合成1 - 6)通过用NaOH处理或Na有机铋的氯化物2 S⋅9H 2 O,两个5,6,7,12-tetrahydrodibenz [ C,F ] [1,5] azabismocine骨架通过硫或氧原子交联。配合物(1 - 6)示出了从2-(氯甲基)环氧乙烷和CO中的环状碳酸酯的合成中催化效率高2。与它们的前体氯化物(7 – 9),甲醇盐10和甲硫醇盐11相比它们是单核有机铋配合物,双核有机铋配合物表现出较高的协同催化作用。然而,用氧桥(配合物1 - 3)不是在空气中稳定和输,因为水解或CO的其催化效率2吸附(形成在后一种情况下有机铋碳酸酯)。尽管如此,双核有机铋复合物(4 - 6)配有一个硫桥是在空气中非常稳定,并且可以在环状碳酸酯的合成可以应用(与卜的共同存在4跨各种环氧化物的NI),从而显示出令人满意的效率和选择性。