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Solution behavior of Hg(II)-cystamine by Uv-Vis and 199 Hg NMR

The combination of HgCl2 with the disulfide salt of 2-aminoethanethiol (cystamine dihydrogen dichloride) in water yields a two-dimensional chain {(HgCl4)((NH3CH2CH2S–)2)}n (1). It consists of six-coordinate Hg in (HgCl4)n units with bridging and termainal Cl atoms. The disulfide groups, (NH3CH2CH2S–)2 are held between the (HgCl4)n chain with weak S–S interactions. The chlorides in the (HgCl4)n units are involved in intermolecular hydrogen bonding to yield a three-dimensional network. A similar reaction with the reduced form of cystamine (2-amino ethanethiol) yields a linear Hg(II)-bis-thiolate, (Hg(SCH2CH2NH3) 2+ (2). When compound 1 is combined with two equivalents of NaOH it rearranges to 2 as indicated by 199 Hg NMR and Uv-Vis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Main Group Chemistry IOS Press

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