Synthesis and Characterization of a Non‐planar Cyclophenylene on Au(111)

We report the surface‐assisted synthesis of a non‐planar cyclophenylene derivative containing four meta‐ and two para‐ connected phenylene moieties on Au(111), via hierarchical Ullmann coupling of a 1,10‐dibrominated angular [3]phenylene and subsequent C–C bond cleavage at the four‐membered rings. Scanning tunneling microscopy and spectroscopy (STM/STS) were used for the characterization of its chemical structure and electronic properties. Density functional theory (DFT) calculations support the experimental observations.