In the complex FeNO2CO2 which obeys EAN rule,''NO'' ligand is assumed to be
1-electron donor
2-electron donor
4-electron donor
3-electron donor
Generally, EAN = Atomic Number- Oxidation State + [2(Coordination Number)]
EAN = 26-0+[2(2)+3(2)]
EAN = 26+10
EAN = 36