A halogen bond route to shorten the ultrashort sextuple bonds in Cr2 and Mo2. Issue 58 (5th July 2017)

• Record Type: Journal Article
• Authors: Joy, Jyothish; Jemmis, Eluvathingal D.
• Is Part Of: Chemical communications. Volume 53:Issue 58(2017)
• Page Start: 8168
• Page End: 8171
• Publication Date: 2017-07-05
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/c7cc04653g
• Languages: English
• ISSNs: 1359-7345

Abstract

Abstract : Selective extraction of destabilizing σ-electrons from the sextuple bond of Cr2 and Mo2 via σ-hole on a halogen bond donor shortens and strengthens the ultra-short metal–metal bond. Abstract : Sextuple bonded group 6 diatomics Cr2 and Mo2 possess ultrashort metal–metal bonds. Yet their bond dissociation energy is very low. The destabilising nature of σ-bonds is responsible for this. Selective extraction of these σ-electrons via a σ-hole on a halogen bond donor shortens and strengthens the metal–metal bond. This study constitutes a hitherto unexplored application of halogen bonding and an example for the true violation of bond order–bond strength relation.