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Química Nova

Print version ISSN 0100-4042On-line version ISSN 1678-7064


HOWE, B. P.; PARISH, R. V.  and  PRITCHARD, R. G.. Synthesis and characterization of new gold (I) phosphine complexes. Quím. Nova [online]. 1998, vol.21, n.5, pp.564-568. ISSN 0100-4042.

In this contribution a few new gold(I)phosphine complexes, [2-(PPh2)C6H4CO 2H]AuX (where X = Cl, SCN, Br3) and a similar gold(III) derivative [{2-(PPh2)C6H4CO 2H}AuIIICl (C6H4CH2NMe2 )]Cl have been synthesised and characterised. The phosphine, 2-(diphenylphosphino)benzoic acid, has been employed for the first time in gold chemistry. This ligand is potentially bidentate through bonding of the phosphine and carboxylate groups. The X-ray structure of the complex chloro[2-(diphenylphosphino) benzoic acid]gold(I) has been elucidated and the bond lengths encountered show great similarity to those of chloro(triphenylphosphine)gold(I). [2-(PPh2)C6H4CO 2H]AuCl crystallises in the space group P21/c with a = 9.113(2) Å, b = 10.925(2) Å, c = 23.069(4) Å, b = 99.95o(3), V = 2299 Å3, Z = 4 and R = 0.091. Biological tests for anti-fungal and anti-bacterial activity demostrate that [2-(PPh2)C6H4CO 2H]AuCl exhibits broad spectrum activity against a range of organisms.

Keywords : gold-organometallics; synthesis; testing.

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