The structure of compound T is shown below. H H H a. On the structure of T above draw a ring around the functional group which makes this compound unsaturated.

To identify the functional group that makes compound T unsaturated, we need to look for features such as double bonds, triple bonds, or specific functional groups like alkenes, alkynes, or aromatic rings.

Without the actual structure of compound T, I can’t draw on it, but I can guide you on how to identify the unsaturation:

1. Look for Double or Triple Bonds: Check if there are any carbon-carbon double bonds (C=C) or triple bonds (C≡C) in the structure.
2. Identify Functional Groups: See if compound T contains functional groups that indicate unsaturation, such as:
   • Alkenes (C=C)
   • Alkynes (C≡C)
   • Aromatic rings (like benzene)

Once you identify the unsaturated functional group in the structure of compound T, you would simply draw a circle around it to indicate its location.

If you can provide the specific structure, I'd be able to assist you further in pinpointing the unsaturated functional group.