This study describes synthesis of novel azo dye reagents, 5-(4-[(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1Hpyrazol-4-yl)diazenyl)phenyl]-5-ethylpyrimxline-2,4 ,6(1H,3H,5H)-trione,(L1),1-(1,5-Dimethyl-3-oxo-2-phenyl-2,3- dihydro-1H-pyrazol-4-yl]-2,3,7,8-tetrahydroxychromeno(5,4,3-cde) chromene-5,10-dione, (L2), and 4-4-(diazene- 1,2-diyl)bis(1,5-dimethyle-2-phenyle-1H-pyrazol- 3(2H)-one, (L3), that prepare from 4-aminoantipyrine with (phenoparpetal, ellagicacid and phenazone) respecti vely as coupling agents and their complexes with Pd(II), Ni(II) and Ag(I) ions. Fixed optimum conditions and effectof solvents were constructed. The Beers law was obeyed … Continue reading Synthesis of novel azo reagents derived from 4-aminoantipyrine and their applications of enhancement of silver nano particles