[1] UNIV SO CALIF, HYDROCARBON RES INST, LOS ANGELES, CA 90089 USA
[2] UNIV SO CALIF, DEPT CHEM, LOS ANGELES, CA 90089 USA
[3] CARNEGIE MELLON UNIV, DEPT CHEM, PITTSBURGH, PA 15235 USA
[4] UNIV ERLANGEN NURNBERG, INST ORGAN CHEM, D-8520 ERLANGEN, FED REP GER
[5] UNIV MILAN, INST PHYS CHEM, I-20133 MILAN, ITALY
[6] UNIV MILAN, CTR CNR, I-20133 MILAN, ITALY