Supramolecular chemistry and anion binding in palladium(II) and silver(l) complexes containing N,N '-dipyridylxanthene-4,5-dicarboxamide ligands

摘要

Two new ligands, 2,7-di-tert-butyl-9,9-dimethyl-N,N'-di(3-pyridyl)- (1) and -N,N'-bis[(3-pyridyl)methyl]xanthene-4,5-dicarboxamide (2), and their complexes with palladium(II) and silver(l) are reported. Intramolecular hydrogen bonding orients the ligands so as to favour formation of macrocyclic complexes, and the structures of [Pd2X4(mu-1)(2)] (3a), X = Cl; (3b) X = Br, and [Ag-2(mu-2)(2)](CF3SO3)(2) (5a) are reported. Intermolecular hydrogen bonding can also occur and can lead to supramolecular self-assembly to give sheet 3a or ribbon 5a structures, or serve to bind anions or solvent molecules. (C) Wiley-VCH Verlag GmbH & Co.