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CH Bond Activation in Cations of the Type {[(2,4,6-Me3C6H2NCH2CH2)2NMe]ZrR}+ and a Simple Solution that Yields a Catalyst for the Living Polymerization of 1-Hexene

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journal contribution
posted on 10.02.2001, 00:00 by Richard R. Schrock, Peter J. Bonitatebus, Yann Schrodi
{[(MesNCH2CH2)2NMe]ZrMe}[B(C6F5)4] and intermediates in the polymerization reaction of 1-hexene that are formed from it decompose as a consequence of CH activation in an ortho methyl group in the mesityl substituent. The intermediates in the polymerization reaction decompose significantly more readily than does {[(MesNCH2CH2)2NMe]ZrMe}[B(C6F5)4]. On the other hand, analogous cationic complexes that contain the [(2,6-Cl2C6H3NCH2CH2)2NMe]2- ligand are relatively stable and will consume 1-hexene in a strictly first-order and apparently living manner at 0 °C in chlorobenzene.