Question

The IUPAC name of the compound

• A. 1-Chloro-2,3-dimethylpentanal
• B. 2,3-Dimethylpentanoylchloride
• C. 1-Chloro-2,3-dimethyl-1-oxopentane
• D. 2,3-Dimethylpentoylchloride

Answer 1

The correct option is B

2,3-Dimethylpentanoylchloride

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