title: High yield syntheses of stable, singly bonded Pd2(6+) compounds.
abstract: 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.
authors.affiliation: Department of Chemistry, Laboratory for Molecular Structure and Bonding, P.O. Box 30012, Texas A&M University, College Station, Texas 77842-3012, USA. cotton@tamu.edu
authors.forename: F Albert
authors.initials: FA
authors.lastname: Cotton
authors.forename: Igor O
authors.initials: IO
authors.lastname: Koshevoy
authors.forename: Pascual
authors.initials: P
authors.lastname: Lahuerta
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Murillo
authors.forename: Mercedes
authors.initials: M
authors.lastname: Sanaú
authors.forename: M Angeles
authors.initials: MA
authors.lastname: Ubeda
authors.forename: Qinliang
authors.initials: Q
authors.lastname: Zhao