title: Homoleptic pnictogen-chalcogen coordination complexes.
abstract: The synthesis and structural characterization of dicationic selenium and tellurium analogues of the carbodiphosphorane and triphosphenium families of compounds are reported. These complexes, [Ch(dppe)][OTf](2) [Ch = Se, Te; dppe = 1,2-bis(diphenylphosphino)ethane; OTf = trifluoromethanesulfonate], are formed using [Ch](2+) reagents via a ligand-exchange protocol and represent extremely rare examples of homoleptic pnictogen → chalcogen coordination complexes. The corresponding arsenic compounds were also prepared, [Ch(dpAse)][OTf](2) [Ch = Se, Te; dpAse = 1,2-bis(diphenylarsino)ethane], exhibiting the first instance of an arsenic → chalcogen dative bond. The electronic structures of these unique compounds were determined and compared to previously reported chalcogen dications.
authors: Department of Chemistry and The Center for Advanced Materials and Biomaterials Research, Western University, 1151 Richmond Street, London, Ontario, Canada N6A 5B7.
authors: Jonathan W
authors: JW
authors: Dube
authors: Mikko M
authors: MM
authors: Hänninen
authors: Jason L
authors: JL
authors: Dutton
authors: Heikki M
authors: HM
authors: Tuononen
authors: Paul J
authors: PJ
authors: Ragogna