Author Contact: A.J.Seen@utas.edu.au
In this laboratory experiment, students explore the use of an immobilized
system to study the isomerization of 1-octene to trans- and
cis- 2-octene. Nafion-H+ is a solid acid ion exchange polymer that both activates the air-sensitive transition metal catalyst and
immobilizes the cationic species that can be characterized by UV-vis
spectroscopy within the polymer matrix. The isomerization is performed
under nitrogen at room temperature and can be completed in two three- or
four-hour lab sessions. The product ratio changes throughout the reaction
and can be used to illustrate the equilibrium distribution of kinetic vs.
thermodynamically stable products.
Supplemental materials are provided on the J. Chem. Educ. website and include student instructions and procedures for preparation of the catalyst and characterization of the Nafion immobilized species.
Summary prepared May 2005 by Julie A. Haack, Department of Chemistry at the University of Oregon.
Seen, A. J. J. Chem. Educ., Print 2004, 81, pp 383-384.