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µ-Oxo and alkoxo complexes of gold(III) with 6-alkyl-2,2′-bipyridines: synthesis, characterization and X-ray structures

Cinellu, Maria Agostina and Minghetti, Giovanni and Pinna, Maria Vittoria and Stoccoro, Sergio and Zucca, Antonio and Manassero, Mario and Sansoni, Mirella (1998) µ-Oxo and alkoxo complexes of gold(III) with 6-alkyl-2,2′-bipyridines: synthesis, characterization and X-ray structures. Journal of the Chemical Society. Dalton Transactions, Vol. 1998 (11), p. 1735-1741. ISSN 0300-9246. Article.

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DOI: 10.1039/A800757h

Abstract

The reactivity of a series of gold(III) adducts [Au(HL)Cl3] 1a4a with 6-alkyl-2,2′-bipyridines HL (N2C10H7R, R = CH2Me 1, CHMe2 2, CMe3 3 and CH2CMe3 4) has been studied. The reactions of 1a4a with silver(I) ions or MeCO2Na afford cationic complexes [Au2(HL)2(µ-O)2]2+ 1b4b (as BF4 or PF6 salts) having the gold atom bonded to the nitrogen atoms of the bipyridine and to two oxygen atoms. The crystal structure of 4b[PF6]2, solved by X-ray diffraction, shows that the cation is a centrosymmetric dimer with two oxo (O2–) groups bridging two [Au{N2C10H7(CH2CMe3)-6}] moieties. In the case of 2a, besides the oxo species, mononuclear ionic derivatives [Au(L*)Cl]+ 2*c [HL* = N2C10H7(CMe2OH)-6; BF4, PF6 or AuCl4 salts] have been isolated. The latter complexes contain an unexpected Au–O bond. The spectroscopic data and the crystal structure of 2*c[AuCl4] indicate a tridentate N,N,O behaviour of the ligand which forms a [5,5]-fused ring system.

Item Type:Article
ID Code:5361
Status:Published
Refereed:Yes
Uncontrolled Keywords:Gold(III) oxo complexes, Au2O3, 6-alkyl-2,29-bipyridines
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Royal Society of Chemistry
ISSN:0300-9246
Deposited On:27 Jan 2011 12:30

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