Write short notes on the the following : (i) Raschig process (ii) Dows Process (ii) Darzens process

Write short notes on the the following : (i) Raschig process (ii) Dow

1.	Write short notes on the the following : (i) Raschig process (ii) Dows Process (ii) Darzens process
Answer» Solution :(i) Raschig process: Chlorobenzene is commercially prepared by passing a mixture of benzene vapour in air and HCL over heated cupric CHLORIDE. (ii). Dow.s process: Chlorobenzene is boiled with Sodium hydroxide to get Phenol. This reaction is called Dow.s process. `UNDERSET("Chloro benzene")(C_6H_5Cl) + NaOH underset("350 atm")overset(350^@C)tounderset("Phenol")(C_6H_5OH) + NaCl` (iii) Darzens process: Ethanol reacts with `SOCl_2` in the presence of PYRIDINE to form chloroethane. This reaction is called Darzens process. `underset("Ethanol")(CH_3-CH_2OH) + SOCl_2 overset("Pyridine")to underset("Chloroethene")(CH_3CH_2Cl) + SO_2 UARR + HCluarr`