If we develop the MO diagram for #"N"_2#, that looks prefer this:

First though, notice that the #p# orbitals are ** supposed** to be

**degenerate**. Lock weren"t attracted that means on this diagram, but they have to be. Anyways, because that the electron configurations, friend would usage a notation favor the above.

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g way "**gerade**", or also symmetry upon inversion, and also u method "**ungerade**", or weird symmetry top top inversion. It"s not crucial that girlfriend memorize which ones are gerade and also which ones space ungerade, because the #pi_g# room antibonding, however the #sigma_u# are *also* antibonding, for example.

That is why ns will use the much easier notation come understand---the #"*"# notation. In here, #sigma##"*"# and also #pi##"*"# are both antibonding. However, i will provide both if you desire to compare.

If we compose the configurations, lock look prefer this:

#"N"_2#:

#<"core 1"s>^2(1sigma_(g))^2(1sigma_(u))^2(pi_u^x)^2(pi_u^y)^2 (2sigma_(g))^2color(red)((pi_g^x)^0(pi_g^y)^0(2sigma_u)^0)#

or

#<"core 1"s>^2(sigma_"2s")^2(sigma_"2s"^"*")^2(pi_"2px")^2(pi_"2py")^2 (sigma_"2pz")^2color(red)((pi_"2px"^"*")^0(pi_"2py"^"*")^0(sigma_"2pz"^"*")^0)#

The red labels indicate that they are empty because that neutral #"N"_2# and you execute not have to write lock out.

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Then if you want to do it for the ions, you simply take out or include in electrons to the red-labeled configuration portions. Again, ns will usage the #"*"# notation because I uncover it much easier to remember which MOs are antibonding/bonding.

#"N"_2^(+)#:

#<"core 1"s>^2(sigma_"2s")^2(sigma_"2s"^"*")^2(pi_"2px")^2(pi_"2py")^2 (sigma_"2pz")^1color(red)((pi_"2px"^"*")^0(pi_"2py"^"*")^0(sigma_"2pz"^"*")^0)#

#"N"_2^(2+)#:

#<"core 1"s>^2(sigma_"2s")^2(sigma_"2s"^"*")^2(pi_"2px")^2(pi_"2py")^2 color(red)((sigma_"2pz")^0(pi_"2px"^"*")^0(pi_"2py"^"*")^0(sigma_"2pz"^"*")^0)#

#"N"_2^(-)#:

#<"core 1"s>^2(sigma_"2s")^2(sigma_"2s"^"*")^2(pi_"2px")^2(pi_"2py")^2 (sigma_"2pz")^2(pi_"2px"^"*")^1color(red)((pi_"2py"^"*")^0(sigma_"2pz"^"*")^0)#

#"N"_2^(2-)#:

#<"core 1"s>^2(sigma_"2s")^2(sigma_"2s"^"*")^2(pi_"2px")^2(pi_"2py")^2 (sigma_"2pz")^2(pi_"2px"^"*")^1(pi_"2py"^"*")^1color(red)((sigma_"2pz"^"*")^0)#