I need help with sources of error in the synthesis of Tetraphenylporphyrin Lab.

Question

I need help with sources of error in the synthesis of Tetraphenylporphyrin Lab. I have to do a lab report on an experiment that didn’t work. The crystals didn’t form. Ideas in what I should talk about? I need help with sources of error in the synthesis of Tetraphenylporphyrin Lab. I have to do a lab report on an experiment that didn’t work. The crystals didn’t form. Ideas in what I should talk about? I have to do a lab report on an experiment that didn’t work. The crystals didn’t form. Ideas in what I should talk about?

Explanation / Answer

The procedure for the synthesis of Tetraphenylporphyrin is , benzaldehyde is dissolved in propionic acid followed by slow addition of pyrrole (freshly distiled) under reflux conditions. Here slow addition of pyrrole is crucial step. Since the reaction is exothermic so the rate of addition must be slow. Second for this reaction you should always use freshly distilled pyrrole.

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