2 TRANSITION-METAL ANTIMONY ETHOXIDES - M(2)SB(4)(OET)(16) - M=NI OR MN

Two new metal alkoxides, nickel antimony ethoxide, Ni2Sb4(OEt)(16), and manganese antimony ethoxide, Mn2Sb4(OEt)(16), have been investigated by means of single-crystal X-ray diffraction. These two transition-metal ethoxides are isostructural with Mg2Sb4(OEt)(16). The major structural differences between the three compounds result mainly from the different sizes of the nickel, manganese and magnesium ions. The fourfold coordination around the Sb atoms and the sixfold coordination around the other metal ions, as well as the conformations of the ethoxide groups, are similar in all three compounds.