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The H-shaped molecule 1,4-di[bis(4′-hydroxyphenyl)methyl]benzene ( 1a ) and its octamethyl derivative ( 1b ) crystallize in solvated and guest-free forms. CH 3 NO 2 and CHCl 3 solvents afforded the rare (5, 4 3 ) net of contiguous pentagons in a two-dimensional (2D) sheet for 1a and 1b, respectively. The tetrahedral carbon centers are 3-connected nodes and hydrogen bonding OH groups are 4-center nodes of congruent cyclopentanoid rings. The first examples of pentagon layer tiling in a lattice inclusion host are reported.
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Thakuria et al. (2008) studied this question.
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