Carbene intermediates are produced by the photolysis of diazomethane `(CH_2N_2)` or ketene `(CH_2 = C = O)`. They are also produced by the reaction of `CHX_3` with base or by Simmons-Smith reaction. There are two types of carbenes, singlet and triplet. They are so called due to their spin state.
Spin state of carbene is determined by using the formula :
where `S` is the sum of all electron spin numbers.

Options

A. `S + 2`
B. `2S + 1`
C. `2S + 2`
D. `S + 1`

Answer

B

Explanation

(b) `(2s + 1)`