Tag Archives: Chemistry

Pick Your Poison

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Naturally occurring tartaric acid is found in the levo (L-) form (pictured below). If given a sample of optically pure tartaric acid of unknown isomeric form, which laboratory instrument or technique would you use to determine its identity?

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Stuck In The Middle With You


When a chemical bond is between a strongly positive and a strongly negative element, the bond is called what?

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Name the Molecule


Provide a name for the following molecule:

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Free Radicals


Which of the following free radicals is most stable?

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Crazy Chemistry

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Incomplete Lewis Structure

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For the incomplete Lewis structure drawn, assign the charges to the O and S atoms of dimethylsulphoxide (DMSO) (overall charge on the molecule is neutral; feel free to consult a periodic table; Me = methyl).

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IR Stretching Frequency

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Choose the molecules containing an IR stretching frequency of 3500-3000 cm-1.

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Lewis Acids

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Which of the following molecules are Lewis acids? (Me = methyl)

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Acylcarnitine

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Consider the following diagram (ref. N Engl J Med 1992; 327:19-23).

It can be inferred from the diagram that acylcarnitine is a molecule which:

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Optically Inactive

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Which of the following solutions/compounds is/are optically inactive?

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