SYNTHESIS, ELECTROCHEMICAL-BEHAVIOR AND STRUCTURAL CHARACTERIZATION OF THE MERCURY COMPLEX [HG([18]ANEN6)].(HGCL4)

Reaction of HgCl2, in slight excess of 1 molar equivalent of the ligan d ([18]aneN6) in water, produces a colourless solution containing [Hg( [18]aneN6)](HgCl4). The X-ray structure of this complex shows that the six nitrogen donor atoms of the macrocycle surround the mercury(II) a tom in a distorted trigonal prismatic coordination. Cyclic voltammetry of [Hg([18]ane)]2+ shows a chemically reversible reduction at a HDM e lectrode, with E1/2 = -0.293 V vs S.C.E. at pH 9.37 and a scan rate of 200 mV s-1. The global oxidation-reduction process involves two elect rons and two protons.