If I\'m doing a synthesis of biphenyl-4-carbonyl if acid using 4-bromobenzoic ac

Question

If I'm doing a synthesis of biphenyl-4-carbonyl if acid using 4-bromobenzoic acid and phenylbornic acid and I use palladium as a catalyst, and add sodium carbonate at the beginning, and I use hcl to convert the sodium carboxylate into a carbonyl if acid and ethanol is used to dissolve the solid product for re crystallization than what impurities might I have in the final product? Also does impurity arise from adding excess hcl? If I'm doing a synthesis of biphenyl-4-carbonyl if acid using 4-bromobenzoic acid and phenylbornic acid and I use palladium as a catalyst, and add sodium carbonate at the beginning, and I use hcl to convert the sodium carboxylate into a carbonyl if acid and ethanol is used to dissolve the solid product for re crystallization than what impurities might I have in the final product? Also does impurity arise from adding excess hcl?

Explanation / Answer

How do you seperate the different phases?

Because the not converted reactant 4.bromocaboxylic acid is also a cabroxylic acid like the product it could be a impurity.

I can't think of an impurity aride from adding to much HCl but its always critical to use too much acid in case of organic compounds

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