A series of kinetic measurements of Tp'Rh(L)(R)H complexes (where L = CNneopentyl, PMe3, P(OMe)3; R = alkyl, aryl, vinyl, benzyl, allyl, and CH2X (X = CN, C=CMe, CH2C(=O)CH3, and others; Tp' = tris-(3,5-dimethylpyrazolyl)borate) have been used to determine relative metal-carbon bond energies in these compounds.  A thermodynamic analysis allows for the extraction of an increase in bond energy for R groups in which the corresponding anion is resonance stabilized, associated with an increase in the ionic contribution to metal-carbon bonding.  Trends will be analyzed in terms of inductive vs. resonance contributions to the bonding.  The bond energies will be used to establish factors controlling regioselectivity.

Why do weaker metal-carbon bonds lead to more stable complexes:  What's going on?

247th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.