《Dynamer and Metallodynamer Interconversion: An Alternative View to Metal Ion Complexation》 was published in Inorganic Chemistry in 2020. These research results belong to Brzechwa-Chodzynska, Anna; Zielinski, Michal; Gilski, Miroslaw; Harrowfield, Jack M.; Stefankiewicz, Artur R.. COA of Formula: C5H3Br2N The article mentions the following:
A bifunctional mol. containing both a bidentate binding site for metal ions and an aminopyrimidine H-bond donor-acceptor site has been synthesized, and its properties, in its free and coordinated forms, have been established in solution and in the solid state by anal. and spectroscopic methods as well as by x-ray structure determinations Structural characterization has shown that it forms a one-dimensional H-bonded polymeric assembly in the solid state, while spectroscopic measurements indicate that it also aggregates in solution The reaction of a simple Fe(II) salt with this assembly results in the emergence of two geometrical isomers of the complex: [FeL3](BF4)2·9H2O-C1 (meridional, mer) and [FeL3]2(SiF6)(BF4)2·12H2O-C2 (facial, fac). While, complex C1 in the solid state generates a one-dimensional H-bonded polymer involving just two ligands on each Fe center, with the chirality of the complex units alternating along the polymer chain, the structure of complex C2 shows NH···N interactions seen in both the ligand and mer complex (C1) structures to be completely absent. Physicochem. properties of the free and complexed ligand differ substantially. Two distinct types of dynamic supramol. polymers (organic/dynamer and metal-organic/metallodynamer) featuring multiple functional groups (both for metal ion coordination and H-bonding interactions) encoded within a single mol. component were synthesized and characterized in the solution and in the solid state. The formation of isomeric Fe(II) complexes shows that drastic modifications of the ligand’s H-bonding interactions result. The experimental part of the paper was very detailed, including the reaction process of 2,5-Dibromopyridine(cas: 624-28-2COA of Formula: C5H3Br2N)
2,5-Dibromopyridine(cas: 624-28-2) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.COA of Formula: C5H3Br2N