Abstract
The product distributions and Arrhenius parameters for the zero-order range have been determined for the dehydration on alumina of a series of primary, secondary, and tertiary aliphatic alcohols and for some alicyclic alcohols. The E 2-like transition state structure is thought to be influenced by inductive, hyperconjugative, and steric effects. The elimination of the β-proton from a trans-position is assumed to proceed via an “inclination” of the adsorbed structure towards the catalyst surface, which bears the basic center. Thus, the cis-preference is easily explained by steric restrictions between certain groups of the adsorbed species and the catalyst surface. The sequence of the activation energies can be explained in the transition state model by the simultaneous influence of ionic, hypcrconjugative, and steric effects, while activation entropies probably demonstrate a certain tunnel contribution in the β-proton abstraction.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
