28. Compare C-O bond lengths in the compounds given below:
OH
OH
CHO
(a)
(a) a>b>c
(b)
(b) b> c>a
(c)
(c) b>a>c
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Answer:
Three functional groups are present in the given compound. Priority will be given to −CHO group. Therefore, numbering will start from the aldehyde group carbon. Hydroxy will get number 2 and oxo group will get number 4.
Hence, the IUPAC name is 2-Hydroxy-4-oxopentanal.
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