NEW ALKOXIDES OF COPPER AND THE ALKALINE AND ALKALINE-EARTH METALS - CRYSTAL-STRUCTURE OF NA2CU[OCH(CF3)2]4

A variety of new alkoxides Ba(OR)2 [R = CEt3, CMeEtPr(i), CH(CMe3)2, 2-tetrahydrofurfuryl, and CH(CF3)2], M[OC(CF3)3]2 (M = Ca, Sr, and Ba), Cu(OCEt3)n (n = 1 and 2), Na2Cu(OR)4 [R = CHMe2, CH(CF3)2, and 2-tetrahydrofurfuryl], NaCu(OR)3 and NaCu(OR)2 (R = CMe3 and CEt3), Ba[Cu(OCMe3)n]2 (n = 2 and 3), and BaCu[OCH(CF3)2]4 were prepared. The compounds were characterized by those methods compatible with their properties including mass, NMR, ESR, and electronic spectroscopy, elemental analysis, sublimation and melting points, molecular weight determinations, and solubility. The alkoxide Na2Cu[OCH(CF3)2]4 crystallizes in the space group C2/c; a = 15.965 (6) angstrom, b = 12.652 (5) angstrom, c = 11.837 (5) angstrom, beta = 94.36 (3)-degrees, Z = 4, and R(F) = 6.07%. The Cu(OR)4(2-) ions have a 22.4-degrees dihedral angle between the two CuO2 planes and Cu-O distances of 1.917 (5) and 1.968 (5) angstrom. The Na+ ions are each coordinated to two O and five F atoms with Na-O distances of 2.281 (6) and 2.318 (6) angstrom and Na-F distances ranging from 2.481 (7) to 2.791 (7) angstrom, with the Na-Cu distances being 3.630 (4) and 3.821 (4) angstrom.