UTILIZATION OF CROWN-ETHER CHEMISTRY TO PREPARE BIMETALLIC COMPOUNDS - PREPARATION AND STRUCTURAL CHARACTERIZATION OF [BA(15-CROWN-5)2][CUCL4]

A solid hetero-bimetallic complex of Ba+2 and Cu+2 was prepared by slo w evaporation of a 3/1 CH3CN/CH3OH mixture containing 15-crown-5 and t he chloride salts of Ba+2, Cu+2, and Y+3. The resulting complex was st udied using single crystal X-ray diffraction. [Ba(15-crown-5)2][CuCl4] crystallizes in the monoclinic space group Pn with cell parameters (2 0-degrees-C), a = 12.119(2), b = 9.386(2), c = 13.475(3)angstrom, beta = 93.81(2)-degrees, and D(calc) = 1.70 g cm-3 for Z = 2. Ba+2 is coor dinated to all 10 oxygen atoms of two 15-crown-5 molecules in a sandwi ch geometry. Cu+2 is coordinated to the four chloride anions and exhib its a distorted tetrahedral geometry. The two shortest Cu...Ba separat ions are 6.855(2) and 6.902(2)angstrom.