Back Cover: Isolation of Tetracyano‐Naphthalenediimide and Its Stable Planar Radical Anion (Angew. Chem. Int. Ed. 50/2018). Issue 50 (21st November 2018)

• Record Type: Journal Article
• Authors: Kumar, Yogendra; Kumar, Sharvan; Mandal, Kalyanashis; Mukhopadhyay, Pritam
• Is Part Of: Angewandte Chemie international edition. Volume 57:Issue 50(2018)
• Page Start: 16570
• Page End: 16570
• Publication Date: 2018-11-21
• Subjects: hydrogen bonds -- noncovalent interactions -- radicals -- structure elucidation -- supramolecular chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201813079
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract : Tetracyanonaphthalenediimide [NDI(CN)4 ], an exceptional π‐acidic planar molecule and one of the strongest known electron acceptors, has been impossible to isolate, until now. Its remarkably large quadrupole moment (QZZ =+55.5B) and extremely low calculated LUMO of −5.2 eV evoked great interest from academia and industry. In their Communication onpage 16318 ff., P. Mukhopadhyay and co‐workers report the isolation of [NDI(CN)4 ] and its ambient‐stable radical anion. Structural and spectroscopic elucidation is provided for these long coveted open‐ and closed‐shell π‐systems.