Give condensed and bond line structural formulae and identify the functional group(s) present if any, for
(i) 2, 2, 4-trimethyl pentane
(ii) 2-hydroxy-1, 2, 3-propanetricarboxylic acid
(iii) Cycloocta-1, 5-diene
(iv) Hexanedial
(v) 2-(4-isobutyl phenyl) propanoic acid

Explanation

To solve the question, we will provide the condensed and bond line structural formulae for each compound listed, along with identifying any functional groups present.

### (i) 2,2,4-trimethylpentane

1. **Identify the structure**: The base structure is pentane (5 carbon atoms). The substituents are three methyl groups located at positions 2 and 4.
2. **Draw the bond line structure**:
- Start with a straight chain of 5 carbon atoms (pentane).
- Add two methyl groups (−CH₃) on the second carbon and one methyl group on the fourth carbon.
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