Which complex has a coordination number of 5 and follows the 18-electron rule?
[Fe(CO)5] (Fe₀, d8) has 5 CO ligands. EAN = 26 + 2 × 5 = 36, but in organometallic context, 8 valence + 10 from ligands = 18 electrons.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Werner's Theory and Definitions - Ligands Coordination Number