Question

Question: Write the structure for the following compounds.

(a) 3-ethyl-4-methylhexane

(b) 3-ethyl-5-isobutyl-3-methylnonane

(c) 4-tert-butyl-2-methylheptane

(d) 5-isopropyl-3,3,4-trimethyloctane

Short answer

Answer

(a)

(b)

(c)

(d)

Step-by-step solution

IUPAC nomenclature

Following steps to be followed while drawing structure of organic compound from given IUPAC name:

• First step is selection of number of carbon atom in parent chain. After knowing number of C-atom draw the number of Carbon.
• Second step is numbering and it is done in such a manner that if any functional group or element or group of atoms are present in the name, they get the lower number.

Explanation for part (a)

In compound (a), parent chain having six carbon atoms as hexane is in suffix. And at positions 3 and 4 ethyl and methyl groups are present respectively. The structure of compound (a) can be given as:

Explanation for part (b)

In compound (b), parent chain having nine carbon atoms as nonane is in suffix. At position 3 methyl and ethyl groups are present. While at position 5 isobutyl group is present. The structure of compound (b) can be given as:

Explanation for part (c)

In compound (c), parent chain having seven carbon atoms as heptane is in suffix. At positions 4 and 2 tert-butyl and methyl groups are present respectively. The structure of compound (c) can be given as:

Explanation for part (d)

In compound (d), parent chain having eight carbon atoms as octane is in suffix. Two methyl groups are at position3 and one methyl group is present at 4. At position 5 isopropyl group is present. The structure of compound (d) can be given as: