Remarkably Short Metal–Metal Bonds: A Lantern‐Type Quintuply Bonded Dichromium(I) Complex

Abstract

The shortest metal–metal bond so far is found in complex anion 2 (CrCr 1.7397(9) Å), which is the one-electron reduction product of thermally stable mixed-valent complex 1 (see scheme). Experimental data unambiguously show that the electronic configuration of 1 is σ2π4δ3, and theoretical studies confirm the presence of a CrCr quintuple bond in 2. Ar=2,6-C6H3(CH3)2. Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z801286_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.