abstract |
Preparation of polymers of conjugated dienes, such as those of 1,3-butadiene; utilizing, as a catalyst, complexes or organomagnesiums with (i) alkali metal hydrides or (ii) tetraalkylammonium hydrides, as, for example, complexes of disec-butyl-magnesiums with potassium hydride or tetramethylammonium chloride. |