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The complexes Hg(SR), 1 and [NR ',] [Hg(SR),] (R' = Et 2 or M e 3) have been obtained from the reaction of HgCI, with NaSR in acetonitrile, with [NR'JCI also present for complexes 2 and 3; S R is cyclohexanethiolate. Complex 1 has a polymeric structure consisting of rather bent Hg(SR), units [Hg-S 2.372(2) and 2.374(2) A, S-Hg-S 160.4(1)"] linked together by weaker Hg-S bonds [3.004(2) and 2.959(2) A]; the Hg atoms have highly distorted tetrahedral co-ordination and each thiolate acts a s a very asymmetric bridge between t w o Hg atoms. Complex 2 contains Hg atoms in a distorted trigonat-planar co-ordination environment, the monomeric anions being well separated from each other. The distortion is mostly in-plane, producing one angle considerably less than, and one considerably greater than, the ideal 120"; the largest angle lies opposite the longest Hg-S bond, and the smallest angle opposite the shortest Hg-S bond. Proton and 13C N M R , far-IR and Raman, and low-energy U V spectroscopic data are discussed. The U V data afford additional support for the proposal of a trigonal-planar [Hg(CysS),]co-ordination environment for the metal receptor site of the MerR metalloregulatory protein. A correlation of co-ordination geometry, Hg-S bond lengths, and Hg-S stretching frequencies is developed for these and other homoleptic thiolate complexes of mercury.

s-OPAT administered by patients or their caregivers using elastomeric devices was safe and effective in the treatment of infections in older people.