Structure of the hydrated and dimethyl sulfoxide solvated rubidium ions in solution

Inorg Chem. 2004 May 31;43(11):3543-9. doi: 10.1021/ic030310t.

Abstract

The structure of the hydrated and the dimethyl sulfoxide solvated rubidium ions in solution has been determined by means of large-angle X-ray scattering (LAXS) and extended X-ray absorption fine structure (EXAFS) studies. The models of the hydrated and dimethyl sulfoxide solvated rubidium ions fitting the experimental data best are square antiprisms with Rb-O bond distances of 2.98(2) and 2.98(3) A, respectively. The EXAFS data show a significant asymmetry in the Rb-O bond distance distribution with C(3) values of 0.0076 and 0.015 A(3), respectively. No second hydration sphere is observed around the hydrated rubidium ion. The dimethyl sulfoxide solvated rubidium ion displays a Rb-O-S bond angle of ca. 130 degrees, which is typical for a medium hard electron acceptor such as rubidium.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Cations
  • Dimethyl Sulfoxide / chemistry*
  • Electrons
  • Mesylates / chemistry
  • Molecular Structure
  • Oxygen / chemistry
  • Rubidium / chemistry*
  • Scattering, Radiation
  • Solutions
  • Spectrometry, X-Ray Emission
  • Water / chemistry*

Substances

  • Cations
  • Mesylates
  • Solutions
  • Water
  • trifluoromethanesulfonic acid
  • Rubidium
  • Oxygen
  • Dimethyl Sulfoxide