X-ray absorption spectroscopic, crystallographic, theoretical (DFT) and chemical evidence for a chalcogen-chalcogen two-center/three-electron half bond in an unprecedented "subselenide" Se2(3-) ligand.
Doing things by halves: The dimeric compound (Cp'Ni)(2)(μ(2)-Se(2)) (Cp' = 1,2,3,4-tetraisopropylcyclopentadienyl), shown in the scheme, was investigated by using low temperature X-ray crystallography and X-ray absorption spectroscopy. The Se K-edge energy strongly indicates a Se physical oxidation state of -1.5, consistent with an unprecedented two-center/three-electron half-bonded Se(2)(3-) or "subselenide" ion.
Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, WI 53706, USA.
Shu A
SA
Yao
Kyle M
KM
Lancaster
Andreas W
AW
Götz
Serena
S
DeBeer
John F
JF
Berry
D018011:Chalcogens / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004583:Electrons; D008024:Ligands; D008958:Models, Molecular; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D064588:Selenium Oxides; D056928:X-Ray Absorption Spectroscopy
D018011:Chalcogens; D008024:Ligands; D009942:Organometallic Compounds; D018036:Selenium Compounds; D064588:Selenium Oxides; D009532:Nickel