Anionic Complexes of the Perfluorinated Three-Mercury Anticrown (o,o’-C6F4C6F4Hg)3. Dependence of the Anion Coordination Type on Counter-Cation in Case of Chloride and Bromide AnionsстатьяИсследовательская статья
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Аннотация:The interaction of the macrocycle (o,o’-C6F4C6F4Hg)3 (1) containing three mercury centres with arylphosphonium salts ([Ph4P]Cl or [Ph4P]Br) yields halide complexes, [Ph4P]{[(o,o’-C6F4C6F4Hg)3](η1:η1-X)} (X=Cl, Br) having infinite polymer chain structure in the crystal. In both adducts, the halide anion is situated outside of the cavity of the three-mercury anticrown 1 and bridged by two mercury centres of neighbouring anticrown moieties. At the same time, when mercuracycle 1 interacts with tetraalkylammonium salts ([nBu4N]Cl or [nBu4N]Br), then the discrete 1:1 complexes [nBu4N]{[(o,o’-C6F4C6F4Hg)3](η3-X)} (X=Cl, Br) of completely different structure are formed. In these halide complexes the anion is located inside the cavity of macrocycle 1 and coordinates the three mercury atoms symmetrically. The synthesized halide complexes [nBu4N]{[(o,o’-C6F4C6F4Hg)3](η3-X)} (X=Cl, Br) are the first example of complexesof the macrocycle 1 where it behaves as anticrown.
