Electronic and Steric Influences on the Rate and Energetics of THF and Me n THF ( n = 1, 2) Displacement from LRe(CO) 2 (L = Tp, Tp*, Cp*) Fragments by Acetonitrile
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The influences of electronic properties and steric demand on the rate and energetics of tetrahydrofuran (THF) and methyltetrahydrofuran (MeTHF) displacement from LRe(CO)2 fragments by acetonitrile were investigated. Kinetic studies were conducted using a Hewlett-Packard diode array spectrophotometer equipped with a Peltier temperature controller. The displacement of THF from LRe(CO)2 complexes was seen to proceed through a dissociative mechanism. While the reactivity of the Re-THF bond was seen to depend on the electronic properties of the ancillary ligands attached to the metal center, the lability of the Re-MenTHF bond was primarily influenced by the steric demands of the departing solvent.
author list (cited authors)
Bengali, A. A., Mezick, B. K., Hart, M. N., & Fereshteh, S.