Radicals

Methyl, Vinylic, Primary, Secondary, Tertiary, Allylic, Benzylic

Rank the radicals from least to most stable:

Secondary

Allylic

Vinylic

Tertiary

Methyl

Primary

Benzylic

Most to least stable

What is the order of these radicals from left to right?

Initiation

Initiation, propagation, or termination?

0 radicals to 2 radicals

Propagation

Initiation, propagation, or termination?

1 radical to 1 radical

Termination

Initiation, propagation, or termination?

2 radicals to 0 radicals

decreases

as electronegativity increases, radical stability _________.

decreases

as S character increases, stability __________.

Most stable to least stable

What is the order of these radicals from left to right?

Down

Radical stability increases going _________ a column of the periodic table.

e.g., F, Cl, Br, I

increases

Radical stability ________ from right to left in a periodic row.

e.g., F < O < N < C

Initiation: Homolytic cleavage

What common pattern in radical mechanisms is this?

0 radicals to 2 radicals

Hydrogen abstraction

What common pattern in radical mechanisms is this?

Halogen abstraction

What common pattern in radical mechanisms is this?

Elimination

What common pattern in radical mechanisms is this?

Addition

What common pattern in radical mechanisms is this?

Termination coupling

What common pattern in radical mechanisms is this?