| Several coordination polymers using neutral Hg(CN)2 as a building block have been prepared. The Lewis-acidic, linear Hg(CN)2 moieties accept chloride ligands in situ from coordinately saturated metal-ligand complex chlorides or organic chloride salts, forming mercury cyanide/chloride double salt anions that in several cases increase the structural dimensionality of the polymer formed. The structures of [Cat][Hg(CN)2Cl] (Cat = organic cation), [Ni(terpy)2][Hg(CN)2Cl] 2 (terpy = 2,2′:6′,6 ″-terpyridine), [Cu(en)2][Hg(CN)2Cl] 2 (en = ethyl enediamine), [Co(en)3][Hg(CN)2Cl 2]{[Hg(CN)2]2Cl}, and [Co(NH3) 6]2[Hg(CN)2]5Cl6·2 H2O range from molecular units to two dimensional layered structures. The presence (or absence), number, and profile of hydrogen bond donor sites of the transition metal amine ligands were observed to strongly influence the structural motif and dimensionality adopted by the anionic double salt coordination polymers, while cation shape and cation charge had little effect. (Abstract shortened by UMI.). |
