Assuming `2s-2p` mixing is `NOT` operative, the paramagnetic species among the following is .

Options

A. `Be_(2)`
B. `B_(2)`
C. `C_(2)`
D. `N_(2)`

Answer

C

Explanation

As it has two unpaired electrons
`Be_(2) =sigma1s^(2) sigma^(**)1s^(2) sigma2s^(2) sigma^(**)2s^(2)`
`Be_(2) =sigma1s^(2) sigma1s^(2) sigma^(**)2s^(2) pi2p_(y)^(1) pi2p_(x)^(1)`
`C_(2) = sigma1s^(2) sigma^(**)1s^(2) sigma2s^(2) sigma^(**)2s^(2) pi2p_(y)^(2) pi2p_(x)^(2)`
`N_(2) =sigma1s^(2) sigma^(**)1s^(2) sigma^(**)2s^(2) pi2p_(y)^(2) pi2p_(y)^(2) sigma2p_(z)^(2)` .