UTILIZATION OF CROWN ETHER CHEMISTRY TO PREPARE BIMETALLIC COMPOUNDS: PREPARATION AND STRUCTURAL CHARACTERIZATION OF [Ba(15-CROWN-5)2][CuCl4]

Abstract A solid hetero-bimetallic complex of Ba+2 and Cu+2 was prepared by slow evaporation of a 3/1 CH3CN/CH3OH mixture containing 15-crown-5 and the chloride salts of Ba+2, Cu+2, and Y+3. The resulting complex was studied using single crystal X-ray diffraction. [Ba(15-crown-5)2][CuCl4] crystallizes in the monoclinic space group Pn with cell parameters (20°C), a=12.119(2), b=9.386(2), c=13.475(3)Å, β=93.81(2)°, and D calc=1.70 g cm−3 for Z=2. Ba+2 is coordinated to all 10 oxygen atoms of two 15-crown-5 molecules in a sandwich geometry. Cu+2 is coordinated to the four chloride anions and exhibits a distorted tetrahedral geometry. The two shortest Cu…Ba separations are 6.855(2) and 6.902(2)Å.