Crystal structure of an unknown tetra­hydro­furan solvate of tetra­kis­(μ (3)-cyanato-κ(3) N:N:N)tetra­kis­[(triphenyl­phosphane-κP)­silver(I)]

In the title compound, [{[(C(6)H(5))(3)P]Ag}(4){NCO}(4)], a distorted Ag(4)N(4)-heterocubane core is set up by four Ag(I) ions being coordinated by the N atoms of the cyanato anions in a μ (3)-bridging mode. In addition, a tri­phenyl­phosphine ligand is datively bonded to each of the Ag(I) ions. Intra­molecular Ag⋯Ag distances as short as 3.133 (9) Å suggest the presence of argentophilic (d (10)⋯d (10)) inter­actions. Five moderate-to-weak C—H⋯O hydrogen-bonding inter­actions are observed in the crystal structure, spanning a three-dimensional network. A region of electron density was treated with the SQUEEZE procedure in PLATON [Spek (2015). Acta Cryst. C71, 9–18] following unsuccessful attempts to model it as being part of disordered tetra­hydro­furan solvent mol­ecules. The given chemical formula and other crystal data do not take into account these solvent mol­ecules.