Abstract
The structures of tetrakis(μ-2,2-dimethylpropanoato-O,O')-bis(3- or 4-picoline)dicopper(II) benzene solvate, [Cu{(CH 3 ) 3 CCOO} 2 C 6 H 7 N] 2 .C 6 H 6 , have been determined by single-crystal X-ray diffraction. The binuclear Cu II complexes have a cage structure with a square-pyramidal coordination geometry around the Cu atoms. The Cu...Cu distances are 2.657 (3) and 2.648 (5) A for 3- and 4-picoline adducts, respectively. In the crystal, benzene molecules are accommodated statistically in a hollow running along the c axis. The magneto-structural correlation could not be determined because of the easy removal of the benzene molecules from the crystals under the reduced pressure conditions at which the magnetic susceptibility measurements were made
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