STUDIES ON SYNTHESIS AND PROPERTIES OF SU PERMOLECULAR COMPOUND INVOLVING COBALTOXIMES WITH A LONG-CHAIN ALKYL AND BETA-CD

Two supermolecular adducts involving beta-cyclodextrin (P-CD) and long carbon chain alkyl (aqua) cobaltoximes (R = C6H13 and C8H17) have bee n synthesized for the first time and characterized by elementary,analy sis, UV-Vis and H-1 NMR. We used the cyclic voltammetry methods to cha racterize the electrochemical behaviour of the inclusion process. In a ddition, their formation constant K-a was quantitatively determined by using UV-Vis methods. It has been shown that the longer the carbon ch ain of the alkyl groups are, the more stable the inclusion complexes a re. furthermore, by adding n-C8H17CO(DH)(2)H2O/beta-CD to the aqueous solution, it has been found that the formation constant decreased.