Preparation of Ethers

Question 1

dehydration of alcohol takes place only with

Answer 1

primary alcohols

Question 2

conditions necessary for dehydration

Answer 2

-primary alcohol
-low temp
otherwise itll form an alkene

Question 3

why dont secondary and tertiary alcohols form ethers by dehydration

Answer 3

undergoes sn1 pathway and forms alkenes.

Question 4

IUPAC name for ethers

Answer 4

carbo compound containing lesser carbon atoms +oxy + compound having more carbon atoms

Question 5

why is bimolecular dehydration not appropriate for the preparation of ethyl methyl ether

Answer 5

not suitable for a mixture of alcohols asit forms an asymmetrical ether

Question 6

anaesthetic that is no longer in use and why

Answer 6

diethyl ether due to slow effect and unpleasant recovery period

Question 7

Williams synthesis

Answer 7

alkyl halide reacts with sodium alkoxide to form an ether

Question 8

williams synthesis is suitable for which compound

Answer 8

all secondary, tertiary(but elimination competes over subtitution) and primary alkyl halides but better results are obtained by primary alkyl halides.

Question 9

why do tertiary alkyl halides not yield ether sometimes

Answer 9

as alkoxides act as strong bases and not only as nucleophiles, it will react with alkyl halides leading to elimination reactions.