For chemoselectivity in transferhydrogenation reactions if n

For chemoselectivity in transfer-hydrogenation reactions:

if no crystals are present after ten minutes, why do you add hcl? what purpose does the HCL serve as?

Solution

If no crystals are present after ten minutes, then concentrated HCl is added. According to the Le chatelier\'s principle i there is any restriction or limitation occurs in the system of equlibrium, then the equilibrium shifts back to neutalise the constarint.

Similarly HCl is also added to shift the equlibrium to counterfiet the constraint occcured.

More the concentration of HCl quicker is the result.