title: Di-μ-chlorido-bis-{[μ-1,8-bis-(diisopropyl-phosphan-yl)-9,10-dihydro-9,10-ethano-anthracene-κP:P']-μ-chlorido-μ-methyl-idene-dipalladium(II)} tetra-hydro-furan penta-solvate.
abstract: The title compound, [Pd(4)(CH(2))(2)Cl(4)(C(28)H(40)P(2))(2)]·5C(4)H(8)O, possesses a tetra-nuclear palladium core with four bridging chlorido ligands and two bridging methyl-ene units, as well as two bridging anthracene-based bis-phosphine ligands. This tetra-nuclear complex can be considered as being composed of two μ-chlorido-bridged LPd(2) units. The structural motif of these LPd(2) units shows two doubly bridged palladium centers between the P atoms of the bis-phosphine ligand. One of these bridges is a μ-Cl atom, the other a μ-methyl-ene group. The coordination environment around each palladium center is essentially square planar. We ascribe the oxidation state +II to the palladium centers and do not assume Pd-Pd bonds [shortest distances 2.8110 (5) and 2.8109 (6) Å]. Co-crystallized with the palladium complex we found five non-coordinating tetra-hydro-furan solvent mol-ecules, one of which is disordered over two positions in a 0.429 (9):0.571 (8) ratio.
authors.affiliation: Organisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Schnetz
authors.forename: Frank
authors.initials: F
authors.lastname: Rominger
authors.forename: Peter
authors.initials: P
authors.lastname: Hofmann