摘要
Closer than most: A series of four dichromium bis(amidinate) complexes of the type [Cr 2 {μ-η 2 -ArNC(R)NAr} 2 ] display an extremely short metal-metal bond of 1.74 Å, independent of the steric hindrance of the ligands. DFT calculations of Cr-Cr bond lengths agree well with the experimental values and computational analysis of their electronic structures indicates quintuple bonding between the two Cr centers. (Chemical Equation Presented) © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.