Abstract
Addition compounds of Hg(CF 3) 2 with [Ph 4P]X and [Ph 4As]X in the 1:1 ratio for X = Cl, Br, I as well as in the 1:2 ratio for X = SCN, were isolated from aquaeous solution and identified by elemental analysis and infrared spectroscopy. Molar conductance of the thiocyanate compounds in nitrobenzene solution points to its complex-salt nature defined as [Ph 4P] 2[Hg(CF 3) 2(SCN) 2] and [Ph 4As] 2[Hg(CF 3) 2-(SCN) 2], but not for the halide compounds. However, in the monoclinic crystals of the chloride ccompound, as shown by X-ray diffractometry, pairs of [Hg(CF 3) 2 molecules are bridged over by two chlorides in a centro-symmetrical dimer with the CHgC bond angle of 160.5(8)° and the Hg…Cl bond length of 2.823(3) and 2.837(4) Å. The structure was refined to the R factor of 0.053. When X = CN no addition compounds were obtained, the reaction products were HCF 3 and the complex salts [Ph 4P] 2- [Hg(CN)] 4 and [Ph 4As] 2[Hg(CN)] 4, not described so far.
Published Version
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