Intramolecular C−H Activation of a Bisphenolate(benzene)-Ligated Titanium Dibenzyl Complex. Competing Pathways Involving α-Hydrogen Abstraction and σ-Bond Metathesis Suzanne R. Golisz Jay A. Labinger John E. Bercaw 10.1021/om100253u.s002 https://acs.figshare.com/articles/journal_contribution/Intramolecular_C_H_Activation_of_a_Bisphenolate_benzene_Ligated_Titanium_Dibenzyl_Complex_Competing_Pathways_Involving_Hydrogen_Abstraction_and_Bond_Metathesis/2715151 A titanium dibenzyl complex featuring a ligand with two phenolates linked by a benzene-1,3-diyl group was found to undergo thermal decomposition to give toluene and a cyclometalated dimeric complex. The thermal decomposition followed first-order kinetics and was studied at a number of temperatures to determine the activation parameters (Δ<i><i>H</i></i><sup><i></i></sup><sup>⧧</sup>= 27.2(5) kcal/mol and Δ<i><i>S</i></i><sup><i></i></sup><sup>⧧</sup> = −6.2(14) cal/(mol K)). Deuterated isotopologues were synthesized to measure the kinetic isotope effects. The complexes with deuterium in the benzyl methylene positions decomposed more slowly than the protio analogues. Isotopologues of toluene with multiple deuteration positions were observed in the product mixtures. These data are consistent with competing α-abstraction and σ-bond metathesis. 2010-11-08 00:00:00 benzene Complex MetathesisA phenolate kinetic Pathway Bisphenolate metathesi Abstraction ligand product mixtures Activation complex decomposition isotopologue toluene isotope effects protio analogues deuterium cyclometalated dimeric activation Dibenzyl parameter data Bond Deuterated abstraction Intramolecular benzyl methylene positions cal dibenzyl deuteration positions kcal Isotopologue bond