Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, WI 53706, USA.
Chemistry. 2012 Jul 23;18(30):9179-83. doi: 10.1002/chem.201201291. Epub 2012 Jun 21.
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.
如图所示,通过使用低温 X 射线晶体学和 X 射线吸收光谱法研究了二聚体化合物 (Cp'Ni)(2)(μ(2)-Se(2))(Cp'=1,2,3,4-四异丙基环戊二烯基)。Se K 边能量强烈表明 Se 的物理氧化态为-1.5,与前所未有的二中心/三电子半键合 Se(2)(3-)或“亚硒化物”离子一致。