Hydrogenation of Simple Olefins (Table I).-Into a 100-ml. steel autoclave was placed 0.5 mole of the olefin to be reduced (cyclohexene, caprylene, or octene-1) together with 7.5 ml.(0.03 mole) of the triisobutylborane. The autoclave was purged with nitrogen, charged to 2500 psi with hydrogen, and heated at 235'for 5 hr. Under these conditions, quantitative reduction was realized as shown by infrared spectroscopy and gas phase ...