Environmentally sustainable analytical reagent like 1-[2’-chloro-5’- sulphophenyl]-3-methyl -4-azo – [2”-carboxy-5”-sulphonic acid]-5-pyrazolone as a spectrophotometric reagent for Fe (III)

1-[2’-Chloro-5’-Sulphophenyl]-3-Methyl-4-Azo–[2”-Carboxy-5”-Sulphonic acid]-5-Pyrazolone was prepared by diazotization of 4-sulphoanthranilic acid and then coupling with 1-[2’-Chloro-5’-Sulphophenyl]-3-Methyl-5- Pyrazolone in alkaline medium. It was characterized by elemental analysis and spectral studies. The transition metal chelates of the same were prepared with Cu2+, Ni2+ , Co2+ , Mn2+ and Fe3+ and characterized by IR spectral studies and physico chemical studies. The antimicrobial activity of ligand and its metal chelates were screened against various gram-positive (+) and gram-negative (─) organism. The results show that all these samples are more or less active agents against various organisms.

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