A Saddle-shaped Macrocycle Comprising 2,5-Diphenylthiophene Units

2,5-Diphenylthiophene-based macrocycles were synthesized by Ni-mediated coupling of the corresponding building units. X-ray analysis revealed that the cyclic trimer had a saddle-shaped structure due to the steric demands of the biphenyl and thiophene-phenylene units, whereas DFT calculation showed that the cyclic dimer had a rigid and almost coplanar structure regardless of the steric hindrance between the benzene rings of the biphenyl units. Moreover, the packing diagram of the cyclic trimer showed alternating stacked layers of macrocycles and solvent molecules.

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