Di-s-buty1zinc.-B ya procedure similar to that described above, di-s-butylzinc was prepared from 68.5 g.(0.5 mole) of s-butyl bromide, 92.0 g.(0.5 mole) of s-butyl iodide, and 140 g.(132 g. Zn, 2.0 g. atom) of zinc-copper couple. The starting temperature was 60". and the
