کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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68708 | 48521 | 2006 | 5 صفحه PDF | دانلود رایگان |
An experimentally simple and inexpensive catalyst system based on hexabutylguanidinium/ZnBr2 has been developed for the coupling of carbon dioxide and epoxides to form cyclic carbonates with significant catalytic activity under mild reaction conditions without using additional organic solvents (e.g. the turnover frequencies (TOF, h−1) values as high as 6.6 × 103 h−1 for styrene oxide and 1.01 × 104 h−1 for epichlorohydrin). This catalyst system also offers the advantages of recyclability and reusability. Therefore, it is a very effective, environmentally benign, and simple catalytic process. The special steric and electrophilic characteristics of hexabutylguanidinium bromide ionic liquid result in the prominent performance of this novel catalyst system.
An experimentally simple and inexpensive catalyst system based on hexabutylguanidinium/ZnBr2 has been developed for the coupling of carbon dioxide and epoxides to form cyclic carbonates with significant catalytic activity under mild reaction conditions without using additional organic solvents (e.g. the turnover frequencies (TOF, h−1) values as high as 6.6 × 103 h−1 for relatively unreactive styrene oxide and 1.01 × 104 h−1 for epichlorohydrin). This catalyst system also offers the advantages of recyclability and reusability. Therefore, it is a very effective, environmentally benign, and simple catalytic process. The special steric and electrophilic characteristics of hexabutylguanidinium bromide ionic liquid result in the prominent performance of this novel catalyst system. Figure optionsDownload as PowerPoint slide
Journal: Journal of Molecular Catalysis A: Chemical - Volume 250, Issues 1–2, 2 May 2006, Pages 30–34