Halometallate and halide ions: nucleophiles in competition for hydrogen bond and halogen bond formation in halopyridinium salts of mixed halide–halometallate anions†
Abstract
The compounds (4-ClpyH)3[PtCl6]Cl (1), (4-XpyH)3[FeCl4]2Cl [X = Cl (2); X = Br (3)] and (3-IpyH)2[AuBr3X]X (X = Cl/Br)
(4)
[n-XPyH =
n-halopyridinium] have been synthesised and crystallographically characterised. Their structures illustrate two potential problems of preparing crystals of