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

Chemistry. 2012 Jul 23;18(30):9179-83. doi: 10.1002/chem.201201291. Epub 2012 Jun 21.

Abstract

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.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Chalcogens / chemistry*
  • Crystallography, X-Ray
  • Electrons
  • Ligands
  • Models, Molecular
  • Nickel / chemistry*
  • Organometallic Compounds / chemistry*
  • Selenium Compounds / chemistry*
  • Selenium Oxides
  • X-Ray Absorption Spectroscopy

Substances

  • Chalcogens
  • Ligands
  • Organometallic Compounds
  • Selenium Compounds
  • Selenium Oxides
  • Nickel