According to `MOT` whch of the following statement about magnetic character and bond order is corrent regarding `O_(2)^(o+)` .

Options

A. Paramagnetic and bond order `lt O_(2)`
B. Paramagnetic and bond order `gt O_(2)`
C. Dimagnetic and bond order `lt O_(2)`
D. Dimagnetic and bond order `gt O_(2)`

Answer

B

Explanation

`O_(2):sigma1s^(2),sigma^(.)s^(2),sigma2s^(2),sigma^(.)2s^(2),sigma2p_(x^(2)){{:(pi2py^(2)),(pi2pz^(2)):}{{:(pi^(+)2py^(1)),(pi^(+)2pz^(0)):}`
Bond order `= (10-6)/(2) = 2.0`
(Two unpaired electrons in antibounding molecular orbital)
`O_(2)^(+):sigma1s^(2),sigma^(.)s^(2),sigma2s^(2),sigma^(.)2s^(2),sigma2p_(x^(2)){{:(pi2py^(2)),(pi2pz^(2)):}{{:(pi^(+)2py^(1)),(pi^(+)2pz^(0)):}`
Bond order `= (10-5)/(2) = 2.5`
(One unpaired electron in antibonding molecular orbital so it is paramagnetic)