Chromium-Catalyzed CO₂–Epoxide Copolymerization

Iminopyrrole, aminopyrrole, and aminophosphine ligands were complexed with various chromium sources, producing eight complexes that were tested for their catalytic behavior toward epoxide–CO2 copolymerization. As elucidated by MALDI-TOF-MS, copolymerizations afforded polycarbonates and poly­(ether-carbonates) exhibiting linear or cyclic topologies.将亚胺基吡咯（iminopyrrole）、氨基吡咯（aminopyrrole）与氨基膦（aminophosphine）配体与多种铬源进行配位，得到八种配合物；随后测试了这些配合物在环氧烷与二氧化碳共聚反应中的催化性能。经基质辅助激光解吸电离飞行时间质谱（MALDI-TOF-MS）表征可知，该共聚反应可生成具有线性或环状拓扑结构的聚碳酸酯及聚醚碳酸酯。