Dilli-Koppanyi

Dillie-Koppanyi test A presumptive test for barbituates. The Dlllle-Koppanyl test reagent has two solutions a 1% solution of cobalt acetate in methanol, followed by a 5% solution of isopropylamine... 

Transition Metal Complexes Related to the Simon test is a family of color-producing reactions based on transition metal complexes (coordination complexes) and tightly associated ion pairs. Coordination complexes arise from a Lewis acid-base interaction between a metal cation, such as cobalt, and an atom with unshared electrons, such as water or, in the case of drugs, basic nitrogen found in alkaloids and amines. Metals that have been used in these reagents include copper, vanadium, bismuth, and cobalt Cobalt, as part of two common reagents (cobalt thiocyanate and Dilli-Koppanyi) is perhaps the most versatile. Cobalt has an electron structure of 3d 4s, while ttie cation has a 3d (2 ) or 3d (3 ") structure. 

Dilli-Koppanyi A presumptive test used mostly for barbiturates and bas on formation of a colored complex with cobalt. 

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