Syntheses and crystal structures of two new coordination polymers constructed from 2‐bromo‐1,4‐benzenedicarboxylate

Abstract

To explore the possibility of obtaining the metal-organic frameworks (MOFs) bearing the 2-bromo-1,4-benzenedicarboxylate ligand, one new Mn(II) and one Co(II) coordination polymers, [Mn(HL) 2 (bipy) 2 ·2H 2 O] ·bipy (1) and [Co(L)(bpe)] (2) (bipy=4,4'-bipyridine; bpe=1,2-bis(4-pyridyl)ethene) were synthesized and characterized by elemental analysis and X-ray diffraction analysis. Compounds 1 exhibits one-dimensional coordination chains, which are further connected to form two dimensional supramolecular networks through hydrogen bonding interactions. Compound 2 presents a two-fold interpenetrating two-dimensional layer structure. The 2-bromo-1,4-benzenedicarboxylate anion exhibits different coordination modes in the two complexes.

Metal–Organic Frameworks and Self-Assembled Supramolecular Coordination Complexes: Comparing and Contrasting the Design, Synthesis, and Functionality of Metal–Organic Materials

“…198f Crystallographic studies in tandem with NMR experiments on segments of large single crystals indicated that macroscopic domains of specific functional ligands were not present. Other examples of multicomponent MOFs have been given by Baiker, 259 Burrows, 213b and Cohen. 213j Quantitative formation of mixed-functionalities is more difficult for SCCs because if two ligands differ only by appended functionalities while possessing the same directionality and type of Lewis-basic sites, statistical mixtures will result.…”

“…Other examples of multicomponent MOFs have been given by Baiker, 259 Burrows, 213b and Cohen. 213j Quantitative formation of mixed-functionalities is more difficult for SCCs because if two ligands differ only by appended functionalities while possessing the same directionality and type of Lewis-basic sites, statistical mixtures will result. Instead of a single thermodynamic product an assembly will produce all iterations of ligand and metal node combinations.…”