Which compound state is the most difficult to Sulfonate?(a) Primary(b) Secondary(c) Tertiary(d) None of the mentionedThe question was posed to me in an interview.My question is from Chemical Structures in chapter Sulfonation and Sulfation of Unit Processes

Which compound state is the most difficult to Sulfonate?(a) Primary(b)

1.	Which compound state is the most difficult to Sulfonate?(a) Primary(b) Secondary(c) Tertiary(d) None of the mentionedThe question was posed to me in an interview.My question is from Chemical Structures in chapter Sulfonation and Sulfation of Unit Processes
Answer» Right CHOICE is (c) Tertiary For explanation I would SAY: A STUDY of the sulfation of ALCOHOLS with sulfuric acid has shown that primary alcohols sulphate ten TIMES as fast as secondary. Therefore tertiary compounds are the most difficult to sulfonate.

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