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Two donor/acceptor complexes between halide anion donors and the tetraiodothiophene acceptor with tetra(n-butyl)ammonium countercations, {(H 9 C 4 ) 4 N ⊕ X ⊖ ···(IC)4Sg (X ⊖  = I ⊖ , SCN ⊖ ) could be crystallized from acetone solutions of the components R4N ⊕ X$ and (IC)4S by using low-gradient techniques. Low temperature structural studies revealed that the molecule packing motifs are layers of halide anion/tetraiodothiophene patterns penetrated each by one of the four R4N ⊕  n-butyl chains. The structure discussion emphasizes observed regularities such as the preferred coordination X ⊖ ···I by the polyiodo acceptor molecules to dimers, followed by the additional aggregation to layers and the inclusion of one n-butyl chain fromeach voluminous R4N ⊕  countercation. Especially this effect could be an essential crystallization principle for the fascinating self-assembly comprising a halide anion and a polyiodo acceptor molecule.

zeitschrift für naturforschung b

Wechselwirkungen in Molekülkristallen, 180 [1, 2]. σ-Donator/Akzeptor-Komplexe {S(CI) 4 ···X ⊖  }(X ⊖  = I ⊖  , SCN ⊖  ) von Tetraiodthiophen in Tetra(n-butyl)ammoniumhalogenid-Salzen/Interaction in Molecular Crystals, 180 [1, 2]. -Donor/Acceptor Complexes {S(CI) 4 ···X ⊖ } (X ⊖ = I ⊖ , SCN ⊖  of Tetraiodothiophene in Tetra(n-butyl)ammonium Halide Salts