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A Mesoionic Diselenolene Anion and the Corresponding Radical Dianion
Author(s) -
Dong Zhaowen,
Sienkiewicz Andrzej,
Suleymanov Abdusalom A.,
Berton Cesare,
FadaeiTirani Farzaneh,
Scopelliti Rosario,
Severin Kay
Publication year - 2022
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202200893
Subject(s) - hexacoordinate , ligand (biochemistry) , non innocent ligand , chemistry , unpaired electron , coordination complex , mesoionic , redox , magnetochemistry , delocalized electron , diamagnetism , photochemistry , radical , ion , inorganic chemistry , metal , organic chemistry , biochemistry , physics , receptor , quantum mechanics , silicon , magnetic field
Dichalcogenolenes are archetypal redox non‐innocent ligands with numerous applications. Herein, a diselenolene ligand with fundamentally different electronic properties is described. A mesoionic diselenolene was prepared by selenation of a C2‐protected imidazolium salt. This ligand is diamagnetic, which is in contrast to the paramagnetic nature of standard dichalcogenolene monoanions. The new ligand is also redox‐active, as demonstrated by isolation of a stable diselenolene radical dianion. The unique electronic properties of the new ligand give rise to unusual coordination chemistry. Thus, preparation of a hexacoordinate aluminum tris(diselenolene) complex and a Lewis acidic aluminate complex with two ligand‐centered unpaired electrons was achieved.