Synthesis and characterisation of N-coordinated pentafluorophenyl gold(i) thiazole-derived complexes and an unusual self-assembly to form a tetrameric gold(i) complex

Stephanie Cronje, Helgard G. Raubenheimer, Hendrik S.C. Spies, Catharine Esterhuysen, Hubert Schmidbaur, Annette Schier, Gert J. Kruger

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Treatment of [Au(C6 F5 )(SC4 H8 )] (1) (SC4 H8 = tetrahydrothiophene or tht) with H[upper bond 1 start]C═NC(CH3 )═C(H)S[upper bond 1 end], CH3 S[upper bond 1 start]C═NC(CH3 )═C(H)S[upper bond 1 end], (I) or piperidine yields the neutral mononuclear imine complexes [Au(C6 F5 )([upper bond 1 start]N═C(H)SC(H)═C[upper bond 1 end]CH3 )] (2) and [Au(C6 F5 )([upper bond 1 start]N═C(SCH3 )SC(H)═C[upper bond 1 end]CH3 )] (3), or the amine complex [Au(C6 F5 )([upper bond 1 start]N(H)CH2 (CH2 )3 C[upper bond 1 end]H2 )] (4). The reaction of 1 with S═[upper bond 1 start]CN(H)C(CH3 )═C(H)S[upper bond 1 end], (II) affords the thione complex [Au(C6 F5 )(S═[upper bond 1 start]CN(H)C(CH3 )═C(H)S[upper bond 1 end])] (5), which, in CH2 Cl2 via spontaneous intermolecular deprotonation of the thione ligand, self-assembles to an unique tetramer of Au(i), [Au(S═[upper bond 1 start]CNC(CH3 )═C(H)S[upper bond 1 end])]4 (6) containing a folded rectangle of Au-atoms with aurophlilic interactions [av. Au⋯Au distance, 3.02(4) Å and av. Au–Au–Au angle, 87(2)°]. N-coordination of the imine complexes has been confirmed by15 N NMR and the crystal structure determination of 2 which exhibits the expected linear N-coordination and intermolecular Au⋯Au [3.345(1) Å] contacts. The crystal structure of 5 shows thione S-coordination of II to the central Au atom.

Original languageEnglish
Pages (from-to)2859-2866
Number of pages8
JournalJournal of the Chemical Society. Dalton Transactions
Volume3
Issue number14
DOIs
StatePublished - 20 Jun 2003
Externally publishedYes

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