Bis(tetra-n-butylammonium) (a redetermination at 150 K) and bis(tetraphenylarsonium) bis(1,3-dithiole-2-thione-4,5-dithiolato)zinc(II) (at 300 K)

• Published in: Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2002-02, Vol.58 (2), p.m105-m108
• Main Authors: Comerlato, Nadia M., Harrison, William T. A., Howie, R. Alan, Low, John Nicolson, Silvino, Alexandre C., Wardell, James L., Wardell, Solange M. S. V.
• Format: Article
• Language: English
• Subjects: Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; Inorganic compounds; Metal complexes; Physics; Structure of solids and liquids; crystallography; Structure of specific crystalline solids
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270101018534

The title compounds are salts of the general form (Q+)2[Zn(dmit)2]2−, where dmit corresponds to the ligand (C3S5)− present in both and Q+ to the counter‐cations (nBu4N)+ [or C16H36N+] and (Ph4As)+ [or C24H20As+], respectively. In the first case, Zn is in the 4e special positions of space group C2/c and hence the [Zn(dmit)2]2− dianion possesses twofold axial crystallographic symmetry. Including these, there are now 11 known examples of [Zn(dmit)2]2− or its analogues, with O replacing the exocyclic thione S, and [Zn(dmio)2]2− dianions in nine structures with various Q. Comparison of these reveals a remarkable variation in details of the conformation which the dianion may adopt in terms of Zn coordination, equivalence of the Zn—S bond lengths, displacement of Zn from the plane of the ligand and overall dianion shape.