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X‐ray Absorption Spectroscopic, Crystallographic, Theoretical (DFT) and Chemical Evidence for a Chalcogen–Chalcogen Two‐Center/Three‐Electron Half Bond in an Unprecedented “Subselenide” Se 2 3− Ligand
Author(s) -
Yao Shu A.,
Lancaster Kyle M.,
Götz Andreas W.,
DeBeer Serena,
Berry John F.
Publication year - 2012
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.201201291
Subject(s) - chalcogen , crystallography , center (category theory) , chemistry , xanes , extended x ray absorption fine structure , absorption (acoustics) , ion , x ray absorption spectroscopy , absorption spectroscopy , ligand (biochemistry) , spectroscopy , materials science , physics , biochemistry , receptor , organic chemistry , quantum mechanics , composite material
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.