Dewar Metallabenzenes from Reactions of Metallacyclobutadienes with Alkynes. (5th May 2022)

• Record Type: Journal Article
• Authors: Wei, Wei; Xu, Xin; Sung, Herman H. Y.; Williams, Ian D.; Lin, Zhenyang; Jia, Guochen
• Is Part Of: Angewandte Chemie. Volume 134:Number 27(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-05
• Subjects: Aromaticity -- Dewar Benzene -- Metallabenzenes -- Rhenium -- Valence Isomers; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202202886
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Dewar benzenes, the metastable valence isomers of benzenes, have been extensively studied both experimentally and theoretically. In contrast, little is known about Dewar metallabenzenes having a transition metal in the skeletal framework, despite the recent intensive interest in the development of chemistry of metallabenzenes. Herein, we report the isolation and characterization of the first examples of structurally characterized Dewar metallabenzenes. These compounds were generated via unprecedented reactions of metallacyclobutadienes with aminoalkynes. Abstract : The first Dewar benzene derivative was obtained over 60 years ago. The first hetero Dewar benzene with a p‐block element (a 2‐Dewar pyridine) was reported 45 years ago. The first examples of structurally characterized Dewar metallabenzenes via unprecedented reactions of metallacyclobutadienes with aminoalkynes have now been successfully prepared.