Question

Which of the following is used as source of dichlorocarbene a. tetrachloromethane b. chloroform c. iodoform d. DDT

Answer 1

Answer:

Dichlorocarbene is most commonly generated by reaction of chloroform and a base such as potassium tert-butoxide or aqueous sodium hydroxide.[1] A phase transfer catalyst, for instance benzyltriethylammonium bromide, facilitates the migration of the hydroxide in the organic phase.

HCCl3 + NaOH → CCl2 + NaCl + H2O

Explanation:

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Answer 2

Option(b) is the correct answer. Chloroform.

• Dichloromethane contains carbon and chlorine.
• Dichlorocarbene is a reactive intermediate.
• It is can be formed by chloroform and strong bases.
• The bases which be used to form dichlorocarbene are potassium-t-butoxide and aqueous sodium hydroxide.
• It is an electrophile.
• Its structure is such that it rapidly enters into bonds.

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