High Yield Syntheses of Stable, Singly Bonded Pd<sub>2</sub><sup>6+</sup> Compounds
作者:F. Albert Cotton、Igor O. Koshevoy、Pascual Lahuerta、Carlos A. Murillo、Mercedes Sanaú、M. Angeles Ubeda、Qinliang Zhao
DOI:10.1021/ja0656595
日期:2006.10.1
A general method for the syntheses of dipalladium compounds having a singly bonded Pd26+ core and the formula R,S-cis-Pd2(C6H4PPh2)2(O2CR)2Cl2 is described. When the alkyl group in the carboxylate ligands is an electron donating group, the compounds are stable and the yields high. The Pd-Pd distances for the diamagnetic compounds with R = CF3 and CMe3 are 2.5434(4) and 2.5241(9) A, respectively. Calculations at the DFT level suggest that the electronic configuration is sigma2pi4delta2delta*2pi*4. These represent rare examples of palladium(III) compounds.