How to convert ethanol to 1,1-dichloroethane?
convert ethanol to 1,1-dichloroethane?


A standard route for producing gem-dichloro compounds involves treatment of a ketone or aldehyde with $\ce{PCl5}$ (see the second to last paragraph in the "Chlorination of organic compounds" section here and page 18 here).



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Therefore, you could carefully oxidize your ethanol to acetaldehyde and treat it with $\ce{PCl5}$.