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Please explain: A street drug dealer is known by police to sell methamphetamine.

ID: 818816 • Letter: P

Question

Please explain:

A street drug dealer is known by police to sell methamphetamine. One of the dealer's friends was caught and told police that the dealer would substitute another more readily available stimulant with methamphetamine to make extra profits. The friend told police that the dealer sometimes purchased caffeine at the local drug store and sold it as methamphetamine. After busting the dealer, the police were left to figure out what exactly was being sold so the dealer could be taken to trail. Below are the IR spectra of both methamphetamine and caffeine. Which spectrum belongs to which compound? What bond accounts for the stretches labeled with arrows. Briefly explain how the police could use IR spectroscopy to determine which compound the drug dealer was selling?

Explanation / Answer

The most important peak to take into account is around 1700 correpsonding to the carbonyl group of the caffeine, the spectrum 1 corresponds to caffeine and spectrum 2 corresponds to methamphetamine