μ-Carbonato-κ⁴O,O′:O′,O′′-bis­{[2′-(di-tert-butyl­phosphan­yl)biphenyl-2-yl-κ²P,C¹]palladium(II)} dichloro­methane monosolvate

The title compound, [(μ₂-CO₃){Pd(P(t-C₄H₉)₂(C₁₂H₈)}₂]·CH₂Cl₂, the first CO₃-bridged palladium dimer complex reported to date, was obtained while preparing the Pd⁰ complex with (2-biphen­yl)P(^tBu)₂. In the crystal, each palladium dimer is accompanied by a dichloro­methane solvent mol­ecule. Coordination of the carbonate and chelated phosphane ligands gives distorted square-planar environments at the Pd atoms. Important geometrical parameters include Pd—P(av.) = 2.2135 (4) Å, Pd—C(av.) = 1.9648 (16) Å and P—Pd—C = 84.05 (5) and 87.98 (5)°, and O—Pd—O′ = 60.56 (4) and 61.13 (4)°. Bonding with the carbonate O atoms shows values of 2.1616 (11) and 2.1452 (11) Å for the Pd—O—Pd bridge, whereas other Pd—O distances are slightly longer at 2.2136 (11) and 2.1946 (11) Å. One of the tert-butyl groups is disordered over two set of sites with an occupancy ratio of 0.723 (6):0.277 (6). Weak C—H...O interactions are observed propagating the molecules along the [100] direction.