Experimental Part 1 - Preparation of 4,7-Dihydroxyflavylium Chloride (DHF) A T B ago D C Figure...

 

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Experimental Part 1 - Preparation of 4,7-Dihydroxyflavylium Chloride (DHF) A T B ago D C Figure 1. Known equilibria of the DHF cation (D) prepared in this experiment. Equimolar amounts (1 mmol) of 2,4-dihydroxybenzaldehyde and 4-hydroxyacetophenone are dissolved in 5 mL of solvent (Ethyl acetate/Methanol, 4/1, v/v). The solution was then cooled to 0°C with trimethylsilyl chloride (10 equivalents) added to the solution. The mixture was then stirred for 10 mins, and placed in the fridge for 3 days. Ethyl acetate was added to the solution until precipitation of the red pigment is complete (approximately 20 mL). The sample is then filtered, air-dried and weighed. 188mg Online delivery additional information - Mass of product **Calculate the molecular mass of DHF CI and determine the product yield providing working using the mass of product corresponding to your allocated lab group. Experimental Part 1 - Preparation of 4,7-Dihydroxyflavylium Chloride (DHF) A T B ago D C Figure 1. Known equilibria of the DHF cation (D) prepared in this experiment. Equimolar amounts (1 mmol) of 2,4-dihydroxybenzaldehyde and 4-hydroxyacetophenone are dissolved in 5 mL of solvent (Ethyl acetate/Methanol, 4/1, v/v). The solution was then cooled to 0°C with trimethylsilyl chloride (10 equivalents) added to the solution. The mixture was then stirred for 10 mins, and placed in the fridge for 3 days. Ethyl acetate was added to the solution until precipitation of the red pigment is complete (approximately 20 mL). The sample is then filtered, air-dried and weighed. 188mg Online delivery additional information - Mass of product **Calculate the molecular mass of DHF CI and determine the product yield providing working using the mass of product corresponding to your allocated lab group.

Answer rating: 100% (QA)

Answer HO HO MW 13812 H HO MW13615 HO Dzo HO HO MW 27404 OH 1 mmol of 24dihydroxybenza... View the full answer