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) |
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| Authors: | Nadia M Comerlato William T A Harrison R Alan Howie John Nicolson Low Alexandre C Silvino James L Wardell Solange M S V Wardell |
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| Abstract: | The title compounds are salts of the general form (Q+)2Zn(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. |
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