Question

what happens when ethanol is heated with conc.hcl and anhydrous zncl2​

Answer 1

Explanation:

when ethanol heated with conc H2so4 it produces ethene with zncl2 there is no reaction

Answer 2

Answer:

Explanation:

Originally Answered: What is the function of ZnCl2 in Lucas Test ?

So it starts like this.

We have to replace -OH group from alcohol by Cl-. That is a type of nucleophilic substitution reaction. Cl- has to replace -OH group.

But -OH is a poor leaving group due to the high electronegativity of oxygen & Cl- is a moderate ( not so good ) nucleophile . So, it is slightly difficult.

So, we use Lucas Reagent ( ZnCl2 + HCl) . ZnCl2 is a lewis acid due to the empty d orbitals of Zn. Oxygen of -OH forms coordinate bond with Zn or in other words complexes with Zinc . Oxygen acquires a positive charge & Zn acquires a negative charge.

So , basically what happens is that a poor leaving group -OH has now been converted into a good leaving group as oxygen now has a positive charge (increased electronegativity).

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