Mercury complexes arsenic ligands

S.2.4.2.4. Complexes of Mercury(l) with Phosphorus-, Arsenic-and Antimony-Donor Ligands. 

Similar unfavorable constants can be obtained for the other cases. A successful agent in complexing the Hg(II) is BAL (British anti-Lewisite), 2,3-dimercaptopropanol, with potent sulfur ligands for the mercury, and also for arsenic, antimony, bismuth, and gold. It is injected intramuscularly in 10% solution in peanut oil at a dose rate of 3 mg/kg of body weight every 4 hr for two days, and after that at decreasing frequency until recovery. 

A variety of new complexes has been described in which [CpM(CO)n] residues (M = Cr, Mo, and W) are attached to phosphorus, arsenic, sulphur, tin, and mercury ligands. The cyclic amino-phosphine PhP(OCH2CHg)aNH has been incorporated both as a mono- and bi-dentate ligand in [CpMo(CO)n] complexes. The diazenido complexes [CpM(CO)gN=NMe] (M = Mo and W) react with (THF)MX [M L = Cr(CO)5 and Mn(CO)gCp] to give thermally stable products of the type [CpM(CO)gN—N(Me)M Ln]. A free-radical mechanism has been proposed for reactions in which the CO ligands in [CpMo(CO)sI] are replaced by alkyl or aryl isonitriles these substitutions are catalysed by [CpMo(CO)s]g. 

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