Crystal structure of tris[4-(3,4-dimethoxythiophen-2-yl)phenyl]amine

In the title compound tris-[4-(3,4-di-meth-oxy-thio-phen-2-yl)phen-yl]amine (DMOT-TPA), C₃₆H₃₃NO₆S₃, the central nitro-gen atom shows no pyramidalization, with the three <i>para</i>-phenyl-ene rings arranged in a propeller-like geometry. Each thio-phene ring is twisted by about 25-29° relative to the adjacent phenyl-ene ring, giving a distorted π-conjugated framework. In the crystal, mol-ecules are linked through multiple C-H⋯π inter-actions into two-dimensional sheets, which extend into a three-dimensional network. A Cambridge Structural Database survey revealed no prior examples of tri-phenyl-amines bearing 3,4-di-meth-oxy-thio-phen units at the <i>para</i> positions. This unique structure provides new insights into the design of redox-active organic materials.