Write the IUPAC names of the following compounds:
`CH_3 - underset(CH_3) underset(|) overset(CH_3)overset(|)C-CH_2-overset(CH_2CH_3)overset(|)(CH)-underset(CH_2 CH_3)underset(|) (CH )- overset(CH_2 CH_3)overset(|)(CH)-CH_3`

Explanation

The given compound can be written as

(i) The longest chain is indicated by dotted lines.
(ii) According to the lowest sum rule, the numbering should be done from the left (the sum of positions when numbering is done from left = 2 + 2 + 4 + 5 + 6 = 19, the sum of positions on doing numbering from right = 3+ 4+ 5+ 7 + 7 = 26).
(iii) The longest chain contains 8 carbon atoms. Hence, the word root is oct.
(iv) It contains two ethyl groups at positions 4 and 5 and three methyl groups at positions 2, 2 and 6.
(v) Since no multiple bond is present, the primary suffix is ane and the IUPAC name of the compound is 4, 5-diethyl-2, 2, 6-trimethyloctane.