NEETChemistryGeneral Organic Chemistry
Which of the following condensed structural formulas correctly represents 4 -bromo- 3 -methylpentan- 2 -ol?
Options
- ACH ₃- CH ( OH )- CH ( Br )- CH ( CH ₃)₂
- BCH ₃- CH ( Br )- CH ( CH ₃)- CH ( OH )- CH ₃
- CCH ₃- CH ( Br )- CH ( CH ₃)- CH ₂- CH ( OH )- CH ₃
- DBr - CH ₂- CH ₂- CH ( CH ₃)- CH ( OH )- CH ₃
Correct answer
B. CH ₃- CH ( Br )- CH ( CH ₃)- CH ( OH )- CH ₃
Step-by-step solution
The root word pentan indicates a parent chain of 5 carbon atoms. The suffix - 2 -ol indicates that the principal functional group, the hydroxyl ( - OH ) group, is located at carbon- 2 . The prefixes 4 -bromo and 3 -methyl indicate a bromine atom at carbon- 4 and a methyl group at carbon- 3 . Analyzing the given options: Option 1 has a 5 -carbon chain. Numbering from left to right gives the - OH group the lowest locant ( 2 ). The substituents are 3 -bromo and 4 -methyl, making its IUPAC name 3 -bromo- 4 -methylpenta