The IUPAC name of given organic compound isСН3-CH(Cl)-CH2-CH2-CHO
Correct answer: C. 4-Chloropentanal
- A. 2-Chloropentanal
- B. 2-Chloropentanol
- C. 4-Chloropentanal
- D. 4-Chloropentanol
Explanation
The correct answer is C: 4-Chloropentanal. To determine the IUPAC name, first identify the longest carbon chain that includes the aldehyde group, which is a 5-carbon chain (pentanal). The aldehyde carbon is always carbon number 1. Chlorine is attached to the fourth carbon, hence the name 4-Chloropentanal. Option A incorrectly places chlorine on the second carbon. Options B and D incorrectly use 'pentanol', indicating an alcohol group, which is not present in the compound.
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Aldehydes and ketones contain the polar carbonyl group, but aldehydes are generally more readily oxidised and more reactive than ketones. Coverage includes preparation by oxidation or reduction routes, nucleophilic addition of reagents such as hydrogen cyanide and bisulfite, and tests that distinguish aldehydes from ketones.
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