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July 4, 2015

Homework Help: organic chem

Posted by vivian on Thursday, September 8, 2011 at 11:02pm.

An unknown compound melted at 131-133C. It is thought to be one of the following compounds(mp,C): trans-cinnamic acid (133-134); benzamide(128-130); DL-malic acid(131-133); or benzoin(135-137). The mixture melting points of the unknown compound with each of the test compounds are listed below. What is the unknown compound? Briefly explain your reasoning.

-trans-cinnamic acid...........110-120
-benzamide.....................130-132
-DL-malic acid..................114-124
-benzoin.........................108-116

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