Olefin trimers can be prepared selectively from α‐olefins with n‐alkyl‐substituted triazacyclohexane–CrCl3 complexes as catalysts in the presence of methyaluminoxane (MAO).

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The Cr‐catalyzed trimerization of 1‐decene and 1‐dodecene is a highly selective method to synthesize C30 and C36 olefins. After hydrogenation, these products display very attractive viscosity indices (VI's). Due to the high trimer selectivity of the reaction no additional work‐up is needed to separate C20, C24 or C40+ oligomers from the product prior to a potential use of these products in synthetic lubricants for automotive applications.

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