Two thiourea-containing gold(I) complexes

O. E. PIRO; E. E. CASTELLANO; R. C. V. PIATTI; A. E. BOLZÁN; A. J. ARVÍA

Acta Cryst. C

IUCr

Año: 2002 vol. 58 p. 252 - 255

The crystal structures of two salts of bis(thiourea)gold(I) complexes, namely bis(thiourea-S)gold(I) chloride, [Au(CH4-N2S)2]Cl, (I), and bis[bis(thiourea-S)gold(I)] sulfate, [Au(CH4N2S)2]2SO4, (II), have been determined. The chloride salt, (I), is isomorphous with the corresponding bromide salt, although there are differences in the bonding. The AuI ion is located on an inversion centre and coordinated by two symmetry-related thiourea ligands through the lone pairs on their S atoms [AuÐS 2.278 (2) A Ê and AuÐSÐC 105.3 (2)]. The sulfate salt, (II), crystallizes with four independent [Au(CH4N2S)2]+ cations per asymmetric unit, all with nearly linear SÐAuÐS bonding. The cations in (II) have similar conformations to that found for (I). The AuÐS distances range from 2.276 (3) to 2.287 (3) A Ê and the AuÐSÐC angles from 173.5 (1) to 177.7 (1). These data are relevant in interpreting different electrochemical processes where gold± thiourea species are formed.