74358-79-5Relevant academic research and scientific papers
Reactions of a methylmercury zwitterionic thiolate complex [MeHg(Tab)]PF6 with various donor ligands: Relevance to methylmercury detoxification
Zheng, Ai-Xia,Li, Hong-Xi,Hou, Kai-Peng,Shi, Jing,Wang, Hui-Fang,Ren, Zhi-Gang,Lang, Jian-Ping
, p. 2699 - 2706 (2012)
Reaction of MeHgI with Ag2O in H2O followed by addition of equimolar TabHPF6 in MeCN gave rise to a methylmercury zwitterionic thiolate complex [MeHg(Tab)]PF6 (1) (TabH = 4-(trimethylammonio)benzenethiol) in a high yield. Treatment of 1 with KI and KSCN afforded an anion exchange product [MeHg(Tab)]I·0.25H2O (2·0.25H2O) and [MeHg(Tab)]SCN (3), respectively, while that of 1 with equimolar Tab resulted in the formation of another MeHg/Tab compound [MeHg(Tab)2]PF6 (4). The cation of 2 or 3 shows an approximately linear structure in which the central Hg(ii) is coordinated by one C atom of one CH3 group and one S atom of a Tab ligand. The Hg(ii) center of the cation of 4 is trigonally coordinated by one C atom of the CH 3 group and two S atoms of two Tab ligands. The analogous reaction of 1 with NH4SCN led to the cleavage of the Hg-C bond of 1 and the formation of a known four-coordinated Hg(ii)/Tab complex [Hg(Tab) 2(SCN)2] (5). When 4 was treated with 4,6-Me 2pymSH or EtSH, another four-coordinated Hg(ii)/Tab complex [Hg(Tab)4]3(PF6)6 (6) was generated in a high yield. The Hg(ii) center of each cation of 6 is tetrahedrally coordinated by four S atoms of four Tab ligands. The results suggested that cleavage of the Hg-C bond in the methylmercury complex 1 could be completed by increasing the coordination number of its Hg(ii) center by S-donor ligands and protonating the methyl group by weak acids. The Royal Society of Chemistry 2012.
