Chloridotris[μ(2)-2-(dimethyl-amino)-ethano-lato]-μ(3)-hydroxido-tri-μ(2)-trifluoro-acetato-tetra-copper(II)...

The title compound, [Cu(4)(C(2)F(3)O(2))(3)(C(4)H(10)NO)(3)Cl(OH)]·C(4)H(8)O or [Cu(4)(TFA)(3)(dmae)(3)Cl(OH)]·THF (dmae is dimeth-yl-amino-ethano-late, TFA is trifluoro-acetate and THF is tetra-hydro-furan), has an approximate mol-ecular threefold symmetry with three equivalent {Cu(dmae)(TFA)} units bridging between a Cu-Cl and a hydroxide unit, with the latter two lying on the mol-ecular threefold axis. However, in the solid state, the tetranuclear complex has C(i) symmetry. The Cu atom bonded to the Cl atom has a distorted tetra-hedral geometry. The other three Cu atoms have distorted square-pyramidal geometries with an NO(4) coordination environment. The bonds within the CuNO(3) base of the pyramid range from 1.953 (2) to 2.033 (3) Å, while the apical Cu-O bonds are significantly longer, ranging from 2.286 (2) to 2.377 (2) Å. The square-pyramidal geometries are augmented by weak inter-actions towards a sixth O atom, forming a highly distorted octa-hedral coordination environment [long Cu-O distances = 2.712 (2)-2.824 (2) Å]. The hydroxide group is hydrogen bonded to the tetra-hydro-furan solvent mol-ecule. One of the -CF(3) groups shows minor disorder over two positions, with a refined occupancy ratio of 0.894 (4):0.106 (5).