6n rules Polyhedral skeletal electron pair theory

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s8 crown



example: s8



electron count = 8 × s = 8 × 6 = 48 electrons.
since n = 8, 6n = 48, cluster 8-membered ring.


6n + 2 cluster: hexane


hexane (c6h14)



electron count = 6 × c + 14 × h = 6 × 4 + 14 × 1 = 38
since n = 6, 6n = 36 , 6n + 2 = 38, cluster 6-membered chain.






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