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.