Structure of Methanol Solvated Iodozinc(II) Complexes in Solution

Abstract

The structures of the solvated zinc ion and the solvated zinc-iodide complexes in methanol solution have been determined by EXAFS. The zinc ion is six-coordinated in an octahedral fashion with a mean Zn-O bond distance of 2.071(4) . According to the stability constants of the zinc-iodide system in methanol solution the first complex, ZnI+, is suppressed, which may indicate that a coordination change takes place at this step. On the other hand, the second complex, ZnI2, predominates at excess of iodide. The methanol solvated ZnI2 complex has a tetrahedral structure with mean Zn-I and Zn-O bond distances of 2.55(1) and 1.99(1) , respectively. The mean Zn-I bond distance in a solution containing a maximal content of ZnI+, ca. 12%, strongly indicates that the first complex also has a tetrahedral structure.

Keywords

Zinc(II) iodide; Methanol; Structure in solution; EXAFS

Published in

Journal of Solution Chemistry
2018, volume: 47, number: 3, pages: 560-567
Publisher: SPRINGER/PLENUM PUBLISHERS

SLU Authors

• Persson, Ingmar

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Physical Chemistry

Publication identifier

• DOI: https://doi.org/10.1007/s10953-018-0737-9

Permanent link to this page (URI)

https://res.slu.se/id/publ/94923