How many of the given complexes follow E.A.N. rule ?

Chemistry Co-ordinatios Compounds General Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

[Fe(CO) 5 ]

[Co 2 (CO) 8 ]

[Fe(C 5 H 5 ) 2 ]

K 3 [Fe(CN) 6 ] (e) [Fe(NO) 2 (CO) 2 ] (f) [CoF 6 ] 4–

Text Solution

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The correct answer is:

4 (a,b,c,e)

Sol. K 3 [Fe(CN) 6 ] = 26 - 3 + 2 × 6 = 35 does not follow E.A.N. rule.

(f) [CoF 6 ] 4– = 27 - 2 + 2 × 6 = 37 does not follow E.A.N. rule

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