期刊
PURE AND APPLIED CHEMISTRY
卷 75, 期 9, 页码 1183-1195出版社
WALTER DE GRUYTER GMBH
DOI: 10.1351/pac200375091183
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The versatile reactivity of B(C6F5)(3) in alkene polymerization reactions is summarized. Adduct formation with basic anions such as CN- and NH2- gives extremely weakly coordinating diborates, which are the basis of some of the most active polymerization catalysts known to date. By contrast, the reaction of B(C6F5)(3) with zirconium half-sandwich complexes leads to extensive C6F5 transfer, including the surprising formation of borole-bridged tripledecker complexes. Main group alkyls undergo such C6F5 exchange reactions very readily unless donor ligands are present. Borate salts of new three-coordinate zinc alkyl cations proved to be highly effective catalysts for the ring-opening polymerization of epoxides and lactones.
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