Infrared studies on organometallic compounds as polymerization catalysts. I. Diethylzinc‐alcohol system for epoxide polymerization

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<jats:title>Abstract</jats:title><jats:p>Infrared spectra of Et<jats:sub>2</jats:sub>Zn‐alcohol system were measured in a liquid cell with KBr or NaCl windows. The reaction of diethylzinc with alcohol proceeds according to the equations: <jats:chem-struct-wrap><jats:chem-struct><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/gif" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/must001.gif"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:chem-struct></jats:chem-struct-wrap></jats:p><jats:p>Reaction 1 takes place rapidly, whereas reaction 2 proceeds very slowly. The active species in the polymerization of propylene oxide was confirmed to be zinc dialkoxide <jats:italic>in situ.</jats:italic> The nature of alcohol and the reaction temperature are important factors in the catalyst activity.</jats:p>

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