• M. D.Farkade
• B.P.Khobragade
• S. E. Bhandarkar
• R.P.Pawar

The origin of the name Cobalt is thought to stem from the German kabold for "evil spirits or goblins", who were superstitiously though to cause trouble for mines, since the cobalt minerals continued arsenic that injured their health and the cobalt ores did not yeild metals when treated using the normal methods. Metal ion complexes are playing an increasing role in the development of antimicrobials. In this research paper we study the antimicrobial properties of cobalt coordination complexes in oxidation state 3+. All complexes are found active when screen for their antimicrobial activity In UV-Vis spectrophotometeric study it is found that the, Hexamine cobalt (III) chloride absorbs at 240nm, Hexanitro cobaltate (III) absorbs at 228nm and hexanitro Co(III) absorbs at 222nm. Thermogravimetric analysis of Co(III) complex of Hexamine cobalt (III) chloride show mass at 80°c to 100°c is due to water lattice weight losses upon decomposition point shows thermal stability. In sodium hexanitro cobaltate (III) shows maximum weight losses at 200°c and above it weight losses continuously upto 650°c. In hexamine Co(III) and hexanitro Co(III) weight losses maximum at 500°c and shows thermal stability upto 650°c. In X-ray Diffraction studies of Co(III) complex of Hexamine cobalt (III) chloride, Sodium hexanitro cobaltate(III), hexamine Co(III) and hexanitro Co(III) shows the nature of the compound is crystalline in nature.

Cobalt complex, X-ray diffraction, Antimicrobial activity, UV- visible

"SYNTHESIS AND STUDY OF COBALT COMPLEXES ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 2, page no.1-3, February-2020, Available :http://www.jetir.org/papers/JETIRDI06001.pdf

"SYNTHESIS AND STUDY OF COBALT COMPLEXES ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 2, page no. pp1-3, February-2020, Available at : http://www.jetir.org/papers/JETIRDI06001.pdf