State the action of HBr on a) acetylene b) methylacetylene. Why HBr can show peroxide effect Not But HCl & HI Explain.
Answers
When acetylene is treated with HBr, the product is Ethylidene bromide.
HCl is a very stable acid H-Cl bond (430 kJ moH) is stronger than H-Br bond (378 kJ mol-1) and is not broken symmetrically by the free radicals generated by peroxide. Hence the free radical addition of HCl to alkenes is not possible. ... Hence HI does not respond to the peroxide effect.
Answer:
a) When acetylene is treated with HBr, the product is Ethylidene bromide. Hcl is a very stable acid H-Cl bond is stronger than H-Br bond and is not broken symmetrically by the free radicals generated by peroxide. Hence the free radical addition of Hcl to alkenes is not possible
HCl is a very stable acid H-Cl bond is stronger than H-Br bond and is not broken symmetrically by the free radicals generated by peroxide. Hence the free radical addition of HCl to alkenes is not possible. Hence HI does not respond to the peroxide effect.