Bond Schemes for Closo Boranes and Carboranes

LOCALIZED BOND SCHEMES FOR CLOSO BORANES AND CARBORANES 

Lipscomb s styx rules can usefully be trimmed to Stx rules ( chop-styx ) by use of a new parameter S, the sum of the numbers of B—H—B and B-B bonds (S = s + j), on the grounds that 3c-2e B—H—B bonds are effectively protonated Ic- le B-B bonds. Unique sets of Stx values can be deduced for borane formulae These too can be adapted for use in carboranes, 

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