The IUPAC name of CH3CH2CHClCH3 is
- A. 1-chlorobutane
- B. 2-chlorobutane
- C. 3-chlorobutane
- D. 2-chloropropane
Explanation
The longest chain has four carbons, giving butane, and numbering from the end that puts the chlorine on the lower numbered carbon makes it position 2 rather than position 3. Naming it 3-chlorobutane means numbering from the wrong end, which is the standard error. The rule is always to give substituents the lowest possible locants.
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IUPAC name of (CH3)3CCH2Br is