Draw the MO diagram for acetylide ion C_(2)^(2-) and calculate its bon

1.	Draw the MO diagram for acetylide ion C_(2)^(2-) and calculate its bond order .
Answer» Solution :Acetylide ION `C_(2)^(2-)` in acetylide `CtoC^(2) + 2E^(-)` `1s^(2) 2s^(2) 2p^(4) "" 1s^(2)2s^(2) 2p^(2)` ELECTRONIC configuration of `C^(2-)` ion is : ` sigma_(1s)^(2) , sigma_(1s)^(**2) , sigma_(1s)^(2) , pi_(2p_(x))^(2), pi_(2p_(Z))^(2)` Bond order `(N_(B) - N_(a))/2 = (8 - 4)/ 2 = 2`

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