Kinetic and mechanistic study of the displacement of eta(2)-coordinated arenes from Cp*Re(CO)(2)(eta(2)-C6H5R) (R = H, CH3, C(CH3)(3)): Evidence for a dissociative mechanism and estimation of the Re-(eta(2)-arene) bond strength uri icon

abstract

  • The displacement of the arene molecule from Cp*Re(CO)2(2-arene) (arene = benzene, toluene, tert-butylbenzene) by pyridine in heptane solution is studied. The rate constants for arene dissociation from the Re center are found to vary in the order Cp*(CO)2Re-(2-toluene) < Cp*(CO)2Re-(2-benzene) Cp*(CO)2Re-(2-tert-butylbenzene) and are a function of the steric and electronic properties of the arene substituents. Activation parameters yield a lower limit of 19-21 kcal/mol for the Cp*(CO)2Re-(2-arene) bond strength.

published proceedings

  • ORGANOMETALLICS

author list (cited authors)

  • Bengali, A. A., & Leicht, A.

citation count

  • 15

complete list of authors

  • Bengali, AA||Leicht, A

publication date

  • April 2001