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The title compound, [Cu 8 (C 4 H 9 O) 4 (C 4 F 9 O) 4 ], crystallizes in the monoclinic space group, P 2 1 / n and contains a self-assembly of two C 16 H 18 Cu 4 F 18 O 4 units linked by bridging tert -butyl groups [Cu-O bonds of length 2.3779 (15) and 2.4248 (15) Å], generating a centrosymmetric dimer. The asymmetrical unit, C 16 H 18 Cu 4 F 18 O 4 , contains an almost square-planar arrangement of the four Cu atoms linked by bridging tert -butyl and perfluorinated tert -butyl groups with Cu-Cu distances ranging from 2.7108 (4) to 2.7612 (4) Å and Cu -Cu-Cu angle values close to 90° [ranging from 89.459 (10)° to 90.025 (11)°]. These dimers are further linked by weak C-H⋯F and F⋯F inter-actions. As is commonly encountered in perfluorinated tert -butyl groups, one of the CF 3 groups is disordered and was refined with two equivalent conformations with occupancies of 0.74 (3) and 0.26 (3).

Tetrakis[μ2-1,1,1,3,3,3-hexafluoro-2-(trifluoromethyl)propan-2-olato]tetrakis(μ3-2-methylpropan-2-olato)octacopper(I)