Further examination of the BEBO model with the results of ab initio calculations of a reaction series

Chandra, AK and Rao, Sreedhara V (1995) Further examination of the BEBO model with the results of ab initio calculations of a reaction series. In: Chemical Physics, 200 (3). pp. 387-393.

PDF Further_examination_of_the.pdf Restricted to Registered users only Download (445kB) | Request a copy

Abstract

The BEBO (bond energy-bond order) model is further examined with the results of ab initio calculations on a series of metathetic reactions involving hydrogen transfer. Energies are calculated at the 6-31G**/PMP2=full/6-31G** level while the bond-orders are estimated using the 6-31G** basis set with the geometry optimisation at the single configuration unrestricted Hartree-Fock frame. Our analysis reveals that for all thermoneutral reactions where the making and breaking bonds are collinear in the transition state, the reduced distensions in the transition state structures are same and independent of the bond-order exponent in the BEBO model. For others such displacements increase with the square of the energy changes during reactions. The Bronsted coefficient is examined and is found to be neither strictly parallel to the position of the barrier in the reaction path nor a measure of the 'transition state' structure of the system.

Item Type:	Journal Article
Publication:	Chemical Physics
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	21 Mar 2007
Last Modified:	19 Sep 2010 04:35
URI:	http://eprints.iisc.ac.in/id/eprint/9800

Actions (login required)

View Item