Crystal structure of cyclo-bis­(μ(4)-2,2-di­allyl­malonato-κ(6) O (1),O (3):O (3):O (1′),O (3′):O (1′))tetra­kis­(triphenyl­phosphane-κP)tetra­silver(I)

In the tetra­nuclear mol­ecule of the title compound, [Ag(4)(C(9)H(10)O(4))(2)(C(18)H(15)P)(4)], the Ag(I) ion is coordinated by one P and three O atoms in a considerably distorted tetra­hedral environment. The two 2,2-di­allyl­malonate anions bridge four Ag(I) ions in a μ(4)-(κ(6) O (1),O (3):O (3):O (1′),O (3′):O (1′)) mode, setting up an Ag(4)O(8)P(4) core (point group symmetry -4..) of corner-sharing tetra­hedra. The shortest intra­molecular Ag⋯Ag distance of 3.9510 (3) Å reveals that no direct d (10)⋯d (10) inter­actions are present. Four weak intra­molecular C—H⋯O hydrogen bonds are observed in the crystal structure of the title compound, which most likely stabilize the tetra­nuclear silver core.