A trans-1,2-Diarylhexafluorocyclobutane

Crystal structure analysis establishes the configuration of one of two isomers of the thermal dimerization of N-[3-(1,2,2-trifluoroethenyl)-4-phenoxyphenyl]phthalimide to be trans-5,5'-[1,2,3,3,4,4-hexafluorocyclobutane-1,2-diylbis(2-phenoxyphenyl)]-N,N'-bis(phthalimide), C₄₄H₂₄F₆N₂O₆. The cyclobutane ring puckers and has a dihedral angle of 23.5 (4)°. The crystal also contains a diethyl ether molecule of solvation, C₄H₁₀O.

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