Previously introduced concepts the anti-Kekulé number and anti-forcing number (Vukicevic et al., J. Math. chem., in press) are applied to cata-condensed benzenoids. It is shown that all cata-benzenoids have anti-Kekulé number either 2 or 3 and both classes are characterized. The explicit formula for anti-forcing number of chain (unbranched) cata-benzenoids is given. It is also shown that anti-forcing number of any cata-benzenoid goes up to h/2 where h is the number of hexagons in a cata-benzenoid.
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Vukičević, D., Trinajstić, N. On the anti-Kekulé number and anti-forcing number of cata-condensed benzenoids. J Math Chem 43, 719–726 (2008). https://doi.org/10.1007/s10910-006-9223-5
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DOI: https://doi.org/10.1007/s10910-006-9223-5