WillD
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u use this synthesis (click). In the end, we add an aqueous alkali solution to the basic pH (>10). Toluene can be used for extraction. Extract we can wash with water, brine, thiosulfate (to wash the remaining iodine). The reaction is well scaled if there is a necessary equipment (good stirring, sufficient volume of a flasks and controlled reflux). But scaling must be made gradually (if there is no experience)
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Hello, I follow the Moscow route. In the last step, hydrogen chloride gas is passed into the toluene extraction solution, and some transparent crystalline substances are obtained in the wall of the beaker, unlike the white powder in the video. I simply can't stand the pungent smell of hydrogen chloride gas. When the toluene solution is poured out at the end, there is still a small amount of yellow oily liquid at the bottom of the beaker. Am I not introducing enough hydrogen chloride?