The donor properties of simple ethers. Part I. Dioxanates formed by some metal halides of the first transition series (Mn–Cu)

Abstract

The magnetic and spectral properties of several 1 : 1 and 2 : 1 adducts of 1,4-dioxan with manganese(II), iron(II), cobalt(II), and nickel(II) halides are reported and interpreted in terms of six-co-ordinate species containing bridging dioxan molecules in the chair conformation. The previously reported 1 : 1 adducts CuX₂,C₄H₈O₂, where X = Cl or Br, are shown to have the stoicheiometry 3CuX₂,2C₄H₈O₂. All these complexes are readily decomposed by moisture and are insoluble in solvents with which they do not react. Far-infrared spectral measurements on FeCl₃,C₄H₈O₂[ν(Fe–Cl) at 380 cm^–1] indicate that this molecule has a five-co-ordinate structure.