Active hydrogenation catalysts from titanium complexes and alkali metal hydrides

Article abstract of DOI:10.1016/0022-328X(90)85216-L

Hydrogenation of 1-hexene was catalyzed by titanium complexes allowed to react in situ with active alkali metal hydrides.Under normal temperature and pressure, a maximum turnover number of 2270 min^-1 was obtained using Cp2TiCl2/NaH as catalyst, while a high turnover of 9290 in 80 min was achieved using a less active but more stable catalyst 2TiCl2/NaH.The hydrogenation rates using these catalysts have a very low temperature dependence, and are still very high even at -30 deg C.The use of active NaH and KH as cocatalysts is the key point for the high catalyst activities.