Preparation of potential macroligands for alkali-metal ions using open-chain polyether carboxylic acids and tricarbonylbis(triphenylphosphine)ruthenium. X-Ray crystal structure of dicarbonylbis[1-(o-carboxymethoxyphenoxy)-2-(o-hydroxyphenoxy)ethanato(1–)]bis(triphenylphosphine)ruthenium(II)

Abstract

The preparation and X-ray crystal structure of the title compound is described. The compound crystallizes in the triclinic space group P(no. 2) with unit-cell dimensions a= 9.677(2), b= 23.161 (6), c= 15.432(5)Å, α= 92.91 (2), β= 91.29(4), γ= 102.16(3), and Z= 2. The structure was refined to a final R factor of 0.094 for 4 681 reflections. The ruthenium ion is octahedrally co-ordinated by two mutually cis carbonyl ligands, two mutually trans phosphine ligands, and two mutually cis L ligands, [1-(o-carboxymethoxyphenoxy)-2-(o-hydroxyphenoxy)ethanato(1–)] each bound to ruthenium by one oxygen of the carboxylate group. The benzene rings of the phosphine ligands are staggered, and prevent close approach of the two L ligands required to form an oxygen cavity suitable for complexation with alkali metals.