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Issue 4, 2012
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Aurophilicity in gold(i) thiosemicarbazone clusters

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The reaction of the phosphine thiosemicarbazone ligands HLPH and HLPMe with Au(I) ions yields the gold complexes [Au3(HLPH)2Cl2]Cl·2MeOH (1·2MeOH) and [Au2(HLPMe)Cl2] (2). The structures determined by X Ray diffraction, [Au3(HLPH)2Cl2]Cl·4MeOH (1·4MeOH) and [Au2(HLPMe)Cl2]2 (2), are the first examples of gold(I) thiosemicarbazone clusters showing aurophilicity. The structure of the trinuclear cation 1 contains the Au(1) atom located in an inversion centre, being connected to another gold(I) atom, Au(2), through a phosphino thiosemicarbazone molecule which acts as a S,P-bridging ligand. Additionally, every gold(I) atom in the trinuclear cation 1 assembles into trinuclear linear cluster units by means of close gold–gold interactions, being connected through the crystal cell in a 2D zigzag mode. The crystal structure of [Au2(HLPMe)Cl2]2 (2) contains one discrete molecule [(AuCl)2(HLPMe)] in the asymmetric unit, which is further assembled into tetranuclear [(AuCl)2(HLPMe)]2 units by means of close gold–gold interactions. Both clusters are highly luminescent in solution.

Graphical abstract: Aurophilicity in gold(i) thiosemicarbazone clusters

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Supplementary files

Article information

05 Sep 2011
19 Oct 2011
First published
24 Nov 2011

Dalton Trans., 2012,41, 1363-1372
Article type

Aurophilicity in gold(I) thiosemicarbazone clusters

A. Castiñeiras and R. Pedrido, Dalton Trans., 2012, 41, 1363
DOI: 10.1039/C1DT11680K

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