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Unsaturated Molecule

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    Could someone clarify what an unsaturated molecule is?

    I just did an AQA mod 3 paper, and it said "state what is meant by an unsaturated compound".

    I said not all the bonds are single bonds, but according to the mark scheme the answer had to positive, and their answer was "contains atleast one double bond". Surely a molecule with a triple bond would be unsaturated too though :confused:
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    you're correct - a triple bond is unsaturated, even more so than a double bond. Think of unsaturation in a molecule as having one or more pi systems and a saturated molecule having all sigma bonds. To satisfy the examiner i suggest you write - a molecule containg one or more pi systems (e.g. double bonds)
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    Thanks

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