CO is not a homo-nuclear atom like C2, N2 or even O3, O3 (both these categories are different: with and without 2s-2p mixing).
So there is a large discrepancy in the atomic energy levels of 2s, 2p e- of C and O.As a result, 2p(pi)x, 2p(pi)y and 2p(sigma)z have lower energy than 2s(sigma)*. So the e- lost is from 2s(sigma)*2 and not 2p(sigma)z.
And hence the bond order increases from 3 to 3.5 and not decreases to 2.5 .
(The typical school textbook formula doesn't work for species like CO,CO+ and even NO,NO+ in many situations):-)
In OF^+ the bond order is 2. It would be O=F
This is very easy ............
3
covalent bond
Bond order is the number of bonds. For a diatomic molecule e.g O2 has bond order two because O=O is a double bond.
The bond order of CO is 3.
The bond order of water is .5.
burn it.
3
1/2
1/2
The bond order of CO plus is actually 3.5. Remember that the order of orbitals in CO+ is not the same as in a homonuclear diatomic molecule.
The bond order of NO is 2.5
The bond order of NO is 2.5
ionic bond
covalent bond
ionic bond
Bond order is the number of bonds. For a diatomic molecule e.g O2 has bond order two because O=O is a double bond.
The bond order of CO is 3.
The bond order of water is .5.