GOLD COORDINATION BY 2-(DIPHENYLPHOSPHANYL)ANILINE

The reaction of 2-(diphenylphosphanyl)aniline (1) with (tetrahydrothio phene)gold(I) chloride in the molar ratio 1:1 gives a stable molecular complex 2, in which the gold atom is bonded to the phosphorus atom. R eaction of two equivalents of ligand 1 with one equivalent of the salt [(tht)(2)Au]ClO4 results in the displacement of both thioether ligand s, affording the ionic complex {[(2-NH2C6H4)PPh2](2)Au}(+) ClO4- (3a), in which the metal center is exclusively P-coordinated. Treatment of [(tht)(2)Au]ClO4 with ligand 1 (1:1) affords the mixed P/S-coordinated complex 4, the structure of which has been confirmed by single-crysta l X-ray diffraction. The reaction of Ligand 1 with [(Ph3P)Au](+) BF4- leads to a mixture of products which are components of an equilibrium between the unsymmetrical salt {[(2-NH2C6H4)PPh2]Au(PPh3)}(+) BF4- wit h the two symmetrical species 3b (the BF4- analogue of 3a) and [(Ph3P) (2)Au](+) BF4-. With {[(Ph3P)Au](3)O}(+) BF4- as the aurating agent, t he ligand 1 (molar ratio 1:1) is converted into a polynuclear complex 7, which is tentatively assigned a structure with intimate aggregation of six gold atoms.