Question

The `IUPAC` name of
`CH_(3)Ch_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C)-underset(CH_(3))underset(|)overset(C_(4)H_(9))overset(|)(C)-CH_(3)`
is
A. (1) 3,4,4-trimethylheptane
B. (2) 3,4,4-triemethyloctane
C. (3) `2`-butyl-`2`-methyl-`3`-ethylbutane
D. (4) `2`-ethyl-`3,3`-dimethylheptane

Answer 1

Correct Answer - B
The compound is a branched alkane. To get the correct `IUPAC` name, we should write the complete structural formula.
`overset(1)(CH_(3))overset(2)(CH_(2))-underset(3,4,4-"Trimethyloctane")(underset(CH_(3))underset(|)overset(H)overset(|3)C-underset(CH_(3))underset(|)overset(overset5CH_(2)overset(6)CH_(2)overset(7)CH_(2)overset(8)CH_(3))overset(|4)C-CH_(3))`
The numbering shold be done from the side nearer to the side chains.