Ozturk, T. and Povey, D.C. and Wallis, J.D. (1997) Heterocyclic cations with delocalised pi-systems and short intramolecular sulfur ... Sulfur contacts: The structures of two derivatives of the 2-(1,3-dithiol-2-ylidenemethyl)-1,3-dithiolium cation. Phosphorus Sulfur and Silicon and the Related Elements, 122 . pp. 313-324. ISSN 0308-664X.
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Abstract
The effective size of bonded divalent sulfur in S...S contacts is a function of the orientation of the groups, with the shortest contacts occurring when the groups are coplanar. A lower limit for the latter is indicated by the structures of the 2-(1,3-benzodithiol-2-ylidenemethyl)-1,3-benzodithiolium and 2-(1,3-dithiolan-2-ylidenemethyl)-1,3-dithiolanium cations, 2 and 3. These show almost mm symmetry with all four sulfur atoms involved in stabilisation of the positive charge. Short intramolecular sulfur...sulfur contact distances, 0.5-0.7 Angstrom within the sum of traditional van der Waals radii, and maximised by in-plane angular distortions, indicate a lower limit to the effective size of the bonded divalent sulfur atom of ca. 1.45 Angstrom.
| Item Type: | Article |
|---|---|
| Uncontrolled keywords: | 2-(1,3-benzodithiol-2-ylidenemethyl)-1,3-benzodithiolium 2-(1,3-dithiolan-2-ylidenemethyl)1,3-dithiolanium; atomic size; X-ray; van der Waals radius molecular structure |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | M.A. Ziai |
| Date Deposited: | 22 Sep 2009 14:32 |
| Last Modified: | 22 Sep 2009 14:32 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/18228 (The current URI for this page, for reference purposes) |
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