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A new family of three-dimensional hydrocarbon polymers which are more energetically favorable than benzene is proposed. Although structurally these polymers are closely related to well known diamond and lonsdaleite carbon structures, using topological arguments we demonstrate that they have no known structural analogs. Topological considerations also give some indication of possible methods of synthesis. Taking into account their exceptional optical, structural and mechanical properties these polymers might have interesting applications.

Supporting information

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Text file https://doi.org/10.1107/S2052520616007253/eb5044sup1.txt
Atomic coordinates for d2lmh

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Text file https://doi.org/10.1107/S2052520616007253/eb5044sup2.txt
Atomic coordinates for dlmh

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Text file https://doi.org/10.1107/S2052520616007253/eb5044sup3.txt
Atomic coordinates for dmh


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