Ordered structures of two sulfur containing donor molecules on the Au(111) surface

► Tetrabenzothianthrene and tetrathiotetracene form long-range ordered commensurate structures on the Au(111) surface ► For TBTA, the reconstruction of the Au(111) surface is maintained. ► The reconstruction is lifted by TTT. ► Both molecules adsorb intact and in a planar configuration. ► For TBTA, the structure indicates that the molecule is planarized upon adsorption.