Cover Picture: A New Conformation With an Extraordinarily Long, 3.04 Å Two‐Electron, Six‐Center Bond Observed for the π‐[TCNE]22− Dimer in [NMe4]2[TCNE]2 (TCNE=Tetracyanoethylene) (Chem. Eur. J. 38/2015). Issue 38 (2nd September 2015)

• Record Type: Journal Article
• Authors: Graham, Adora G.; Mota, Fernando; Shurdha, Endrit; Rheingold, Arnold L.; Novoa, Juan J.; Miller, Joel S.
• Is Part Of: Chemistry. Volume 21:Issue 38(2015)
• Page Start: 13141
• Page End: 13141
• Publication Date: 2015-09-02
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201583801
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="graphical" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>By modifying the size .</bold> of the cation, the π‐[TCNE]₂²⁻ dimer (TCNE=tetracyanoethenide), which previously had only been observed in the eclipsed <italic>D</italic>_2h conformation, has been obtained in the slipped <italic>C</italic>₂ conformer, as reported by J. J. Novoa, J. S. Miller et al. in their Full Paper on <ext-link ext-link-type="doi" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">page 13240 ff.</ext-link> This finding expands understanding of the long, multicenter bond, and opens up new regions of its potential energy surface for study. The newly identified non‐eclipsed, <italic>C</italic>₂ π‐[TCNE]₂²⁻ dimer exhibits a new type of a long, intradimer bond involving one strong C⋅⋅⋅C and two weak C⋅⋅⋅N components.<graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgj2hh2kr83" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> </abstract>