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The Schiff bases are widely employed as ligands in complex formation with metal ions and derived from an aldehyde and any amine which coordinate to metal ions via azomethine nitrogen. They are an important class of organic compounds with a wide variety of biological properties [1] and coordinate with many transition metal ions producing metal complexes that display motivating physical, chemical, biological and catalytic properties [2-10]. Many studies have been reported regarding the biological activities of Schiff bases, including their anticancer [11,12], antibacterial [13,14], antifungal and herbicidal activities [15]. They are also used as an optical and electrosensors, as well as in various chromatographic methods, to enhance selectivity and sensitivity. The reaction occurs between the aldehyde group of 11-cis-retinal and the amino group of protein (Opsin) forming the rhodopsin visual pigment responsible for sending an impulse to the brain causing vision after light incidence [16]. In continuation to our interest in metal complexes of Schiff bases, the present study describes the coordination behaviour of novel Schiff base derived from the condensation of 2-aminophenol and isatin toward some transition metals namely Co(II),

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