1,2-Bis(undecyl­sulfan­yl)benzene

In the title compound, C28H50S2, the alkyl chains adopt a fully extended all-trans conformation and each of them is almost perfectly planar. One of the alkyl chains is coplanar with the benzene ring and the other is twisted out of the benzene ring plane; the C—C—S—C torsion angles are 176.4 (2) and 80.8 (3)°. In the crystal structure, an inter­molecular S⋯S inter­action [3.2123 (13) Å] links the mol­ecules into a centrosymmetric dimer; dimers are linked through weak C—H⋯π and C—H⋯S inter­actions, forming a column along the a axis

Surface Structures Formed by a Copper(II) Complex of Alkyl-Derivatized Indigo

Assembled structures of dyes have great influence on their coloring function. For example, metal ions added in the dyeing process are known to prevent fading of color. Thus, we have investigated the influence of an addition of copper(II) ion on the surface structure of alkyl-derivatized indigo. Scanning tunneling microscope (STM) analysis revealed that the copper(II) complexes of indigo formed orderly lamellar structures on a HOPG substrate. These lamellar structures of the complexes are found to be more stable than those of alkyl-derivatized indigos alone. Furthermore, 2D chirality was observed