Bis(μ-diphenylphosphinato-O:O')bis(dimethylaluminium)

The title compound, [Al₂(C₁₂H₁₀O₂P)₂(CH₃)₄], contains discrete centrosymmetric molecules each containing a slightly puckered eight-membered (Al—O—P—O—)₂ ring. Displacements from the plane of the four O atoms are 0.28 (1) and 0.15 (1) Å for the P and Al atoms, respectively. The Al—O bond distances are 1.781 (3) and 1.794 (3) Å, while the P—O distances are 1.512 (3) and 1.505 (2) Å.