Inorganica Chimica Acta p. 163 - 168 (1996)
Update date:2022-08-05
Topics:
Cerrada, Elena
Jones, Peter G.
Laguna, Antonio
Laguna, Mariano
The synthesis of hetero-bridged dinuclear gold(I) complexes with the C3S52- (1,3-dithiole-2-thione-4,5-dithiolate) ligand has been tested by different methods: (i) reaction of [Au(μ-L-L)X2]n- with Na2C3S5 ethanolic solutions; (ii) reaction of [Au2(C3S5) (AsPh3)]n with different bidentate ligands. The resulting complexes Q[Au2(μ-C3S5) (μ-CH2PPh2CH2)] (1), [Au2(μ-C3S5) (μ-dppe)] (2) and Q[Au2(C3S5) (S2CNR2)] (R = Me (3), Et (4) or CH2Ph (5)) have been characterized by analysis, conductivity, IR, 31P and 1H NMR. Complex (PPN)2[Au(C3S5)2] (6) (PPN = N(PPh3)2) has been achieved by reaction of [AuCl(tht)] (tht = tetrahydrothiophene) or [AuCl(AsPh3)] with Na2C3S5 and addition of (PPN)Cl. Reaction of 1 with (TTF)3(BF4)2 (TTF = tetrathiafulvalene) affords (TTF) [Au2(C3S5) (CH2PPh2CH2)] (7) and reaction of 6 with AgClO4 gives a polynuclear complex [Au2Ag2(C3S5)2] (8). Compacted pellets of 7 and 8 show conductivities of 2 × 10-7 and 3 × 10-5 S cm-1 at room temperature. The structure of NBu4-[Au2(C3S5) (CH2PPh2CH2)] (1a) has been established by an X-ray diffraction study and shows a nine-membered diauracycle with an Au...Au distance of 3.026(1) A.
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