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  • Title: Polymorphs of 1,1-bis(4-hydroxyphenyl)cyclohexane and multiple Z' crystal structures by melt and sublimation crystallization.
    Author: Sarma B, Roy S, Nangia A.
    Journal: Chem Commun (Camb); 2006 Dec 21; (47):4918-20. PubMed ID: 17136246.
    Abstract:
    Close packing conflict in a metastable polymorph of the pure title host (Z' = 2, melt crystal m) is resolved in the stable form (Z' = 1, sublimed crystal s) as O-H...O hydrogen bond changes to O-H...pi interaction. Melt crystallization and sublimation show a greater percentage of high Z' structures in CSD statistics.
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