Which is faster bromination or chlorination?

Chlorination is faster than bromination because chlorine is more reactive.

Why is bromination more selective than chlorination?

Bromination of alkanes occurs by a similar mechanism, but is slower and more selective because a bromine atom is a less reactive hydrogen abstraction agent than a chlorine atom, as reflected by the higher bond energy of H-Cl than H-Br.

Which element is most selective in its halogenation?

Bromine radical is less reactive and more selective. In contrast, chlorine radical is more reactive and less selective in its reaction.

What is the product of light activated bromination of ethane?

Bromination of Ethane (11.2A) We describe the general mechanism of alkane halogenation using bromination of ethane (CH3CH3) to give bromoethane (CH3CH2Br). The Symbol h . This reaction occurs when we irradiate a mixture of ethane and Br2, either as gases or in a solvent, with ultraviolet (UV) or visible light.

What are the two main difference between chlorination and bromination?

We’ll do the math in a second, but the key difference is that in chlorination, the key propagation step is exothermic and in bromination, the key propagation step is endothermic. This is because chlorination forms a strong H-Cl bond (103 kcal/mol) and bromination forms a much weaker H-Br bond (87 kcal/mol).

Why does bromine react faster than chlorine?

Although the bromine nucleus is more positively charged than the chlorine nucleus, the increase in the radius and the extra shielding in the bromine atom outweigh this factor, which means that an electron is more easily attracted into the outer shell of a chlorine atom than that of a bromine atom, so chlorine is more …

What will be the products of the bromination of methane?

When a mixture of methane and bromine is exposed to ultraviolet light – typically sunlight – a substitution reaction occurs and the organic product is bromomethane. That means that you could get any of bromomethane, dibromomethane, tribromomethane or tetrabromomethane.

How is chlorination different from bromination?

What is chlorination of methane?

If a mixture of methane and chlorine is exposed to a flame, it explodes – producing carbon and hydrogen chloride. The reaction we are going to explore is a more gentle one between methane and chlorine in the presence of ultraviolet light – typically sunlight.

What is the major product of chlorination of methane?

carbon tetrachloride
Depending on reaction conditions, the chlorination of methane yields dichloromethane, chloroform and carbon tetrachloride. In most hydrocarbons, more than one possible product exists depending on which hydrogen is replaced.

Why is bromine less reactive than chlorine?

Because a bromine atom has one more full shell than a chlorine atom, it has more shielding which means the attraction between the nucleus and an electron is weaker.