Crystal structure of a Pd(4) carbonyl tri­phenyl­phosphane cluster [Pd(4)(CO)(5)(PPh(3))(4)]·2C(4)H(8)O, comparing solvates

Attempts to synthesize Au–Pd heterometallic compounds from homonuclear palladium or gold complexes, [Pd(PtBu(2))(2)] and [Au(PPh(3))Cl] in a tetra­hydro­furan (THF) solution under a CO atmosphere resulted in a homonuclear Pd cluster, namely penta­kis­(μ-carbonyl-κ(2) C:C)tetra­kis­(tri­phenyl­phosphane-κP)tetrapalladium(5 Pd—Pd) tetra­hydro­furan disolvate, [Pd(4)(CO)(5)(C(18)H(15)P)(4)]·2C(4)H(8)O. The complex mol­ecule lies on a twofold rotation axis. The crystal structure is described in relation to the CH(2)Cl(2) solvate previously determined by our group [Willocq et al. (2011 ▸). Inorg. Chim. Acta, 373, 233–242], and in particular to the desolvated structure [Feltham et al. (1985 ▸). Inorg. Chem. 24, 1503–1510]. It is assumed that the title compound transforms into the latter structure, upon gradual loss of solvent mol­ecules. In the title compound, the symmetry-unique THF solvent mol­ecule is linked to the complex mol­ecule by a weak C—H⋯O hydrogen bond. Contributions of disordered solvent molecules to the diffraction intensities, most likely associated with methanol, were removed with the SQUEEZE [Spek (2015). Acta Cryst. C71, 9–18] algorithm.