Some piperidine derivatives of gold(I): crystal and molecular structure of chloro(piperidine)gold(I)

The preparation and isolation of (I)[Au(pip)Cl], (II)[AuCl(pip)2], and (III)[Au(pip)2][PF6](where pip = piper-idine) are described. The X-ray structure of (I) is reported : it consists of linear [(pip)AuCl] molecules arranged in tetramers, the gold atoms forming a loose square cluster. The structure was determined by the heavy-atom method from 1089 unique reflections measured by diffractomer and refined by least-squares techniques to R 0.064. Crystals are tetragonal, a= 12.474(20), c= 9.694(10)Å, Z= 8.