Question 14 of 32intermediate🔧 ApplyShort Answer4 marks
Write IUPAC names of the products obtained by the ozonolysis of the following compounds: (i) Pent-2-ene (ii) 3,4-Dimethylhept-3-ene (iii) 2-Ethylbut-1-ene (iv) 1-Phenylbut-1-ene
(i)
Answer
Ethanal and Propanal
(ii)
Answer
Butan-2-one and Pentan-2-one
(iii)
Answer
Methanal and Pentan-3-one
(iv)
Answer
Benzaldehyde and Propanal
Explanation
Ozonolysis of alkenes involves the addition of an ozone molecule to the alkene to form an ozonide, followed by cleavage of the ozonide by Zn-H2O to yield smaller carbonyl molecules (aldehydes or ketones). The double bond in the alkene breaks, and each carbon of the double bond becomes a carbonyl carbon. If the carbon had one hydrogen attached, it forms an aldehyde; if it had two alkyl groups, it forms a ketone.