What is selectivity of bromine?

For bromination, the reaction is selective for secondary C-H over primary C-H by a factor of 97/(3/3) = 97 to 1. Wow!!!

Which is more selective chlorination or bromination?

Reason: Bromination of alkane is highly selective compared to chlorination reaction.

What is selectivity in halogenation?

Radical halogenation is selective for the most substituted C-H. More Substituted Radicals Are More. Stable (by Hyperconjugation)

What is the selectivity ratio of chlorine?

This gives us a ratio of 55:15 , or 3.66. So for this reaction, the free radical chlorination of propane at 25°C, chlorine is 3.66 times more selective for secondary hydrogens than for primary hydrogens.

Why is bromination highly selective?

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.

What is selectivity in chemistry?

The recommended definition of Selectivity is: Selectivity refers to the extent to which the method can be used to determine particular analytes in mixtures or matrices without interferences from other components of similar behavior.

Why is bromine so selective?

Why chlorination is faster than bromination?

Chlorination is faster than bromination because chlorine is more reactive.

Why is bromine highly selective?

What do you mean by reactivity and selectivity?

In chemistry the reactivity–selectivity principle or RSP states that a more reactive chemical compound or reactive intermediate is less selective in chemical reactions. In this context selectivity represents the ratio of reaction rates.

How do you find the selectivity factor?

It is generally calculated by k’ = (tR – tM)/tM = tR’/tM. g) The selectivity factor (α) of a column for two analytes (A eluting before B) is given by α = KB/KA = k'(B)/k'(A) = tR'(B)/tR'(A).

What are the four types of selectivity?

Terms in this set (4)

• Selective Exposure. Choosing media channels that are in agreement with your worldviews and ignoring those that don’t.
• Selective Attention. People tend to pay attention to parts of a message that fits their worldviews and avoid those they don’t.
• Selective Retention.
• Selective Perception.