"Thus, by carbon atoms, M is an alkali metal selected from sodium, the combination of the organo-alkali metal and hexaalkylpotassium, rubidium, and cesium, O is oxygen, and n is phosphorarnide randomizers, a surprisingly lower amount an integer from 1 to 3, inclusive, and hexaphosphorof randomizers than heretofore thought necessary pro amide of the formula duces a substantially completely random co" . . . . . .