Jump to main content
Jump to site search

Issue 11, 2010
Previous Article Next Article

Organic-soluble optically pure anionic metal complexes PPh4[MIII(S,S-EDDS)]·2H2O (M = Fe, Co, Cr)

Author affiliations

Abstract

The first organic-soluble, optically and diastereomerically pure EDDS metal complexes have been synthesised. A number of synthetic approaches were attempted, but finally the tetraphenylphosphonium series emerged as providing readily accessible compounds of trivalent Cr, Fe and Co in reasonable yields via the silver salts without the need to perform ion-exchange chromatography. The species PPh4[MIII(S,S-EDDS)] are very soluble in methanol, acetonitrile and even THF but isolation was facilitated by addition of stoichiometric water giving the highly crystalline but still conveniently soluble title compounds. The structures of the three isomorphous crystals comprise H2O-bridged extended hydrogen bonded structures with large channels occupied by the counterion molecules. The magnetic properties and circular dichroism spectra are reported along with comparative data for water-soluble NH4[FeIII(S,S-EDDS)]. Phase purity (and hence diastereomeric purity) in the paramagnetic systems is assessed through powder XRD. The practical utility of this type of compound was confirmed by optical resolution of (±)-[RuII(bpy)3]Cl2.

Graphical abstract: Organic-soluble optically pure anionic metal complexes PPh4[MIII(S,S-EDDS)]·2H2O (M = Fe, Co, Cr)

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Nov 2009, accepted on 15 Jan 2010 and first published on 09 Feb 2010


Article type: Paper
DOI: 10.1039/B924787D
Citation: Dalton Trans., 2010,39, 2919-2927
  •   Request permissions

    Organic-soluble optically pure anionic metal complexes PPh4[MIII(S,S-EDDS)]·2H2O (M = Fe, Co, Cr)

    N. P. Chmel, S. E. Howson, L. E. N. Allan, J. Barker, G. J. Clarkson, S. S. Turner and P. Scott, Dalton Trans., 2010, 39, 2919
    DOI: 10.1039/B924787D

Search articles by author

Spotlight

Advertisements