We’re being asked to determine the degrees of unsaturation for the given structure:
Recall that the degrees of unsaturation or index of hydrogen deficiency (IHD) tell us how many hydrogens are missing in a structure.
In a given structure, the IHD is:
• Rings: +1
• Double bonds: +1
• Triple bonds: +2
For a given structure, we simply need to determine the number of rings, double and triple bonds to determine the IHD.
How many unsaturations are present in the following compound?
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What scientific concept do you need to know in order to solve this problem?
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