In this method the sample alcohol is treated with PI3 to get the iodoalkane which is again treated with AgNO2 to get the nitroalkane. The nitroalkane is then treated with nitrous acid which is obtained by NaNO2 and HCl.
This method involves treating the sample alcohol with PI3 to produce an iodoalkane, which is further treated with AgNO2 to generate a nitroalkane. The nitroalkane is then subjected to nitrous acid, prepared by combining NaNO2 and HCl.