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What is the correct IUPAC name of the compound CH2(CN)-CH(CN)-CH2(CN)?

1. 1,2,3-Tricyano propane
2. Propane-1,2,3-trinitrile
3. 1,2,3-Cyano propane
4. Propane-1,2,3-tricarbonitrile

Correct answer: Propane-1,2,3-tricarbonitrile

Solution

The compound has a three-carbon (propane) backbone with one -CN group on each carbon. Since the carbon of each CN group is not counted as part of the main chain, the IUPAC suffix is 'carbonitrile', giving propane-1,2,3-tricarbonitrile.

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