Publications Repository - Gdańsk University of Technology

Cocrystals of seven star-shaped triaryl compounds with pentafluorophenol (pfp) were prepared and structurally characterized by the single-crystal X-ray diffraction method. Cocrystallization of pfp with planar (or almost planar) compounds gave six 3:1 molecular complexes with well-defined layered structures. The layers are composed of alternating pfp3 trimers, linked by hydrogen bonding, and triaryl molecules held together in planes by the weak C–H···F interactions. Stacking interactions of the triaryl-substituted molecules with the perfluorinated rings of pfp are responsible for the overall crystal packing, but most likely also stabilize the trimers in the solid state, as the assembly of the pfp into trimers provide an optimal geometry for the π···π interaction. The layers are flat for the cases of components with almost planar geometry and corrugated for those with more twisted geometry. In the case of nonplanar triphenyl isocyanurate, the pfp cocrystal does not contain pfp3 trimers, the stoichiometry changes from 3:1 to 3:2 (3 refers to pfp), and the packing is mainly controlled by intermolecular O–H···O=C hydrogen bonding.

Authors

• dr inż. Jan Alfuth link open in new tab ,
• prof. dr hab. inż. Jarosław Chojnacki link open in new tab ,
• prof. dr hab. inż. Tadeusz Połoński link open in new tab ,
• dr hab. inż. Aleksander Herman link open in new tab ,
• prof. dr hab. inż. Maria Milewska link open in new tab ,
• dr hab. inż. Teresa Olszewska link open in new tab