Tetracyano-p-phenylenediamine (2).-To a solution of 80 g. of freshly fused potassium acetate in 650 ml. of glacial acetic acid and 80 ml. of acetic anhydride cooled in ice was added, in about 10-g. portions, over 30 min., 130 g.(1.0 mole) of tetracyanoethane with stirring under nitrogen. The temperature rose spontaneously to about 15" while the solution became dark. Stirring waa continued at ice-bath temperatures for 1 hr. and at room ...
