Question

The IUPAC name of the compound

• A. 1-Chloro-2, 3-dimethyl pentanal
• B. 2, 3-Dimethylpetanoyl chloride
• C. 1-Chloro-2, 3-dimethyl-1-oxopentane
• D. 2, 3-Dimethylpentoyl chloride

Answer 1

The correct option is B

2, 3-Dimethylpetanoyl chloride

The given compound is an acid halide or halogen derivative of a carboxylic acid.when the primary

functional group is $-\stackrel{O}{\stackrel{||}{C}}-X$,then ti is named as alkanoyl halide (according to the saturation, substituents etc.).The given compound can be written as:

There are no carbon - carbon multiple bonds

primary suffix = ane
secondary suffix = oylchloride
secondary prefix =2,3 dimethyl

Hence the IUPAC name is
(b) 2,3-Dimethylpentanoylchloride