Abstract

Raman spectra of aqueous solutions containing zinc chloride or zinc bromide and of extracts into tri-n-butyl phosphate (TBP) have been obtained. The spectra are in agreement with a tetrahedral structure ( T d ) for the ions [ZnA 4] 2− (A = Cl, Br) and indicate that the molecules ZnA 2 have a linear configuration ( D ∞ h ) in both aqueous and TBP solutions. There is some evidence that the ions [ZnA 3] − have a planar triangular structure ( D 3 h ). Probable arrangements are given for water and TBP molecules in the inner co-ordination sphere of the zinc atom in the various complexes.

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