Methods of Preparation of Haloalkanes

Question 1

why is thionyl chloride preferred?

Answer 1

alkyl halide + so2 + hcl is formed and as these gases are escapable, pure alkyl halides are formed.

Question 2

order of reactivity of alcohols with halogen acids

Answer 2

3>2>1

Question 3

from alkanes by free radical halogenation gives

Answer 3

yields isomeric mono and polyhaloalkanes

Question 4

why is free radical halogenation not ideal

Answer 4

as they are difficult to break as pure compounds.

Question 5

addition of hydrogen halides

Answer 5

alkene + HX gives alkyl halides(markovnikovs rule)

Question 6

Method to detect a double bond

Answer 6

addition of halogen in ccl4

Question 7

addition of halogens to alkenes

Answer 7

addition of bromine in ccl4 results in discharge of reddish brown color of bromine which forms vic-dibromides(colourless)

Question 8

Finkelstein Reaction

Answer 8

R-X + NaI in dry acetone yields R-I +NaX

Question 9

Swarts Reaction

Answer 9

heating an alkyl halide in the presence of a metallic fluoride to synthesize alkyl fluorides

Question 10

metallic fluorides

Answer 10

AgF, Hg2F2, CoF2 or SbF3