Kinetics of reaction of triethyl-aluminium with n-octene-1 in hydrocarbon solution

Abstract

Kinetic analysis confirms that monomeric triethyl-aluminium is the reactive species. Previous ambiguities concerning the rate equation are resolved. The limiting form, –d[RCH : CH₂]/dt=k₁c^½_Al2[RCH : CH₂], is attained at high concentration of triethyl-aluminium (c_Al2) up to 393 K. Arrhenius parameters for k₁ are calculated. Two determinations of the equilibrium constant for dissociation of Al₂Et₆ in hydrocarbon solution indicate a higher extent of dissociation above 363 K than previously supposed. Rate coefficients and Arrhenius parameters for the rate-controlling reactions of monomeric Et₃Al on n-1-alkenes have been recalculated on this basis.