Generalizations of the Stone-Wales rearrangement for cage compounds, including fullerenes
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Generalizations of the Stone-Wales (pyracylene) rearrangement are proposed for fullerenes and other cage compounds. These involve various numbers of pairs of hexagons fused via a zig-zag sequence of edges, ending in two faces which are polygons of any ring size. This generalized rearrangement may lead either to automerization, or more often to rearrangements changing one isomer of a cage into another. Applications to fullerenes with 5-and 6-membered rings are discussed, as well as other types of cages with larger and smaller rings.