Jump to main content
Jump to site search

Issue 16, 2012
Previous Article Next Article

Synthesis and structures of cyclic gold complexes containing diphosphine ligands and luminescent properties of the high nuclearity species

Author affiliations

Abstract

A mixture of cyclic gold(I) complexes [Au2(μ-cis-dppen)2]X2 (X = OTf 1, PF63) and [Au(cis-dppen)2]X (X = OTf 2, PF64) is obtained from the reaction of [Au(tht)2]X (tht = tetrahydrothiophene) with one equivalent of cis-dppen [dppen = 1,2-bis(diphenylphosphino)ethylene]. The analogous reaction with trans-dppen or dppa [dppa = bis(diphenylphosphino)acetylene] affords the cyclic trinuclear [Au3(μ-trans-dppen)3]X3 (X = OTf 11, PF612) and tetranuclear [Au4(μ-dppa)4]X4 (X = OTf 13, PF614, ClO415) gold complexes, respectively. Recrystallization of 15 from CH2Cl2/MeOH yielded a crystal of the octanuclear gold cluster [Au8Cl2(μ-dppa)4](ClO4)216. Attempts to prepare dicationic binuclear gold(II) species from the reaction of a mixture of 3 and 4 with halogens gave a mixture of products, the components of which confirmed to be acyclic binuclear gold(I) [Au2X2(cis-dppen)] (X = I 5, Br 7) and cyclic mononuclear gold(III) [AuX2(cis-dppen)]PF6 (X = I 6, Br 8) complexes. Complexes 11–14 reveal weak emission in butyronitrile glass at 77 K, but they are non-emissive at room temperature. Ab initio modelling was performed to determine the charge state of the gold atoms involved. Extensive structural comparisons were made to experimental data to benchmark these calculations and rationalize the conformations.

Graphical abstract: Synthesis and structures of cyclic gold complexes containing diphosphine ligands and luminescent properties of the high nuclearity species

Back to tab navigation

Supplementary files

Publication details

The article was received on 12 Sep 2011, accepted on 24 Jan 2012 and first published on 02 Mar 2012


Article type: Paper
DOI: 10.1039/C2DT11722C
Citation: Dalton Trans., 2012,41, 4789-4798
  •   Request permissions

    Synthesis and structures of cyclic gold complexes containing diphosphine ligands and luminescent properties of the high nuclearity species

    S. Bhargava, K. Kitadai, T. Masashi, D. W. Drumm, S. P. Russo, V. W. Yam, T. K. Lee, J. Wagler and N. Mirzadeh, Dalton Trans., 2012, 41, 4789
    DOI: 10.1039/C2DT11722C

Search articles by author

Spotlight

Advertisements