Clathrate Compound Formed by Benzene with an Ammonia–Nickel Cyanide Complex

THE clathrate type of molecular compound is formed by the imprisonment of one sort of molecule in some kind of cage structure of the other component. In the compound the molecular component M is trapped during formation of the cage C from molecules or other complexes which exist in the same solution with it. Although certainty may be attained only by exact structural investigations, it is possible to make a preliminary assignment of a particular molecular compound to this class on general grounds.