Sticky counterions: Low-temperature kinetic NMR studies were performed to determine ΔH ≠ and ΔS ≠ values for the insertion of a single 2-methyl-1-heptene molecule into a Zr-C bond of [Cp 2Zr(η 2-CH 2NMePh)][X] (1a: X -=MeB(C 6F 5) 3 -, 1b: B(C 6F 5) 4 -) in [D 8]toluene and a 1:1 mixture of [D 8]toluene and [D 5]chlorobenzene. Both activation parameters critically depend on the interplay of the counterion and the solvent. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Low-temperature kinetic NMR studies on the insertion of a single olefin molecule into a Zr-C bond: Assessing the counterion-solvent interplay
CIANCALEONI, GIANLUCA;
2011-01-01
Abstract
Sticky counterions: Low-temperature kinetic NMR studies were performed to determine ΔH ≠ and ΔS ≠ values for the insertion of a single 2-methyl-1-heptene molecule into a Zr-C bond of [Cp 2Zr(η 2-CH 2NMePh)][X] (1a: X -=MeB(C 6F 5) 3 -, 1b: B(C 6F 5) 4 -) in [D 8]toluene and a 1:1 mixture of [D 8]toluene and [D 5]chlorobenzene. Both activation parameters critically depend on the interplay of the counterion and the solvent. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.File in questo prodotto:
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