Crystal structure of bis­[tetra­kis­(tetra­hydro­furan-κO)lithium] bis[μ-2,2′,2′′-methanetriyltris(4,6-di-tert-butylphenolato)-κ(4) O,O′:O′,O′′]­dimagnesiate

The title ion-association metal complex, [Li(C(4)H(8)O)(4)](2)[Mg(2)(C(43)H(61)O(3))(2)], has been synthesized from the tridentate phenolic ligand tris­(3,5-di-tert-butyl-2-hy­droxy­phen­yl)methane in tetra­hydro­furan (THF). The aryl­oxo magnesiate complex anion is binuclear with each Mg(2)O(4) complex unit inversion-related and bridged through the two tridentate chelating phenolate O-donors of the ligand. The complex centres have a distorted tetra­hedral stereochemistry [Mg—O range 1.8796 (17)–2.0005 (16) Å] and an Mg⋯Mg separation of 2.9430 (14) Å]. The LiO(4) coodination sphere of the cation comprises four THF O-donor atoms and has a slightly distorted tetra­hedral conformation [Li—O range 1.899 (5)– 1.953 (5) Å]. In the crystal, a number of stabilizing intra-anion C—H⋯O hydrogen-bonding inter­actions are present but no inter-species associations are found.