The Wade-Mingos electron-counting rule

Cast in terms of eve, the rule for a main group cluster is  

For a deltahedron of order n, there are 4n + 2 eve associated with cluster bonding. 

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For example, both Hiickel aromatics B and C conform to the Wade-Mingos electron counting rules [2] (see Chapter 1.1.2) and to the structural systematics developed for boranes and heteroboranes [1] the hexagonal bipyramid with the apices removed is in agreement with an arachno electron count of 18 SE for (CH)g [2],... 

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