How can I prepar complex of Co(DMG)2 solution for Uv/Vis determination from CoCl2.6H2O? what's the condition?
Dear Sir. Concerning your issue about how can you prepare the complex of Co(DMG)2 solution for Uv/Vis determination from CoCl2.6H2O. Dimethylgyoxime (1.12 g) was dissolved into 40 mL ethanol under hot condition on a water bath, and solid CoCl2.6H2O (1.10 g) was added into it. When CoCl2.6H2O was dissolved, tri-ethanolamine (0.8 mL) was added and the resultant green solution was cooled to room temperature. A stream of air was passed through the solution for about an hour while the color of the solution changed to brown. The resultant solution was allowed to stand at room temperature. A brown solid was formed which was separated by filtration, washed with ethanol, and dried in air. The solid product was then recrystallized from a warm solution of ethanol. A light red crystalline product was obtained, separated by decantation of mother liquor and dried in air. For more details, I think the following below links may help you in your analysis:
www.banglajol.info/index.php/DUJS/article/download/10345/7635
http://www.rexresearch.com/cohex/hexaammine.pdf
Thanks
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