The crystal structures of the molecular complexes between benzidine and 7,7,8,8-tetracyano-p-quinodimethane. I. Benzidine–TCNQ complex containing dichloromethane

Abstract

Crystals of the 1 : 1 complex of benzidine and 7,7,8,, containing dichloromethane in the crystal lattice, are monoclinic, space group 12/m, with a=20.892, b=9"950, c= 6.445 *, fl= 91.92 °, Z= 2. The structure was refined by three-dimensional analysis using the blockdiagonal and full-matrix least-squares method. Benzidine and TCNQ molecules are alternately stacked along the c axis to form columns, with the molecular planes almost parallel to each other. Between the columns there are channels running along the c axis, in which dichloromethane molecules are sited.

The Crystal Structures of the Molecular Complexes between Benzidine and 7,7,8,8-Tetracyano-p-quinodimethane. II. The Benzidine-TCNQ Solvent-Free Complex

“…BD and TCNQ are alternately stacked along the c axis to form mixed molecular columns. The structure within these columns is the same as that found in crystals of the BD-TCNQ complex containing dichloromethane [Ikemoto, Chikaishi, Yakushi & Kuroda (1972).Acta Cryst. B28, 3502-3506], but, instead of forming a channelled structure as observed in the latter complex, the molecular columns are closely packed.…”

“…BD and TCNQ are alternately stacked along the c axis to form mixed molecular columns. The structure within these columns is the same as that found in crystals of the BD-TCNQ complex containing dichloromethane [Ikemoto, Chikaishi, Yakushi & Kuroda (1972).…”

The crystal structure of benzidene–s-trinitrobenzene 1:1 molecular complex benzene solvate

“…This arrangement is consistent with the molecular ratio of the components found by chemical analysis. We have found similar structures for crystals of the BD-TCNQ complexes containing other solvent molecules (dichloromethane: Ikemoto, Chikaishi, Yakushi & Kuroda, 1972;benzene: Yakushi, lkemoto & Kuroda, 1974). In crystals eters.…”

The crystal and molecular structure of 1-kestose: a correction

“…BD and TCNQ form solid molecular complexes which contain solvent molecules in the crystal lattice as well as the solvent-free complex. The structure of the BD-TCNQ complex containing dichloromethane has already been reported (Ikemoto, Chikaishi, Yakushi & Kuroda, 1972). In the solvent-free crystal, the relative orientation of the donor and acceptor molecules within a BD-TCNQ column is the same as that in the dichloromethane-containing crystal, but these molecular columns are closely packed without leaving space to accommodate solvent molecules.…”