PHYSICO-CHEMICAL STUDIES OF COMPLEX FORMATION BETWEEN MOLYBDIC AND TARTARIC ACIDS. PART II. STUDIES ON THE OPTICAL ROTATION PROPERTIES OF MOLYBDOTARTARIC ACID COMPLEX IN PRESENCE OF DIFFERENT BASES, ACIDS AND ALCOHOLS

The stability of complex molybdotartaric acid in different pH and in solutions containing suitable organic acids, alcohols and phenols which lire expected to form similar co-ordina-tion complex as tartaric acid, has been examined by measuring optical rotatory power. The change of the rotation values of such complex solution has been associated mainly with the preferential formation of the undissociated acid or its ions between pH limits 1.0 and 4 2 and the complex breaks beyond that on either side. The relative affinities of oxalic, malonic, succinic, citric and malic acids for complex formation with molybdic acid in solution containing tartaric acid are calculated from optical rotation values.