123074-73-7Relevant academic research and scientific papers
Macrocyclic Inclusion Complexes. Synthesis, X-ray Structural Analysis, and Formation of Mono- and Dinuclear Transition-Metal Complexes of Dipyridino Crown Ethers
Newkome, George R.,Kiefer, Garry E.,Kohli, Dalip K.,Xia, Yuan-Jiao,Fronczek, Frank R.,Baker, Gregory R.
, p. 5105 - 5110 (1989)
The synthesis of crown ether derivatives containing the dipyridino subunit is described.Direct nucleophilic displacement by the glycolates of di-, tri-, tetra-, penta-, and hexaethylene glycol on 6,6'-bis(chloromethyl)-2,2'-dipyridine resulted in an extensive series of macrocycles; the addition of Co(II), Cu(II), Zn(II), and Pd(II) salts to the 1:1- and 2:2-macrocycles generated the corresponding complexes.X-ray crystallography confirmed the structure of the 2:2-macrocycle derived from diethylene glycol as well as the related unsymmetrical derivative arising from glycol fragmentation.The ligands were fully characterized by 1H NMR spectroscopy, and a europium shift study was conducted on a representative 1:1-macrocycle in order to establish the preferred site of complexation.
Bipyridine building blocks for self-organization systems: First complete NMR-spectroscopic investigation of 6,6′-disubstituted 2,2′-bipyridines obtained via N-oxidation route and related reactions
Schubert, Ulrich S.,Newkome, George R.,Go?ldel, Andreas,Pemp, Alexander,Kersten, Jo?rg L.,Eisenbach, Claus D.
, p. 2141 - 2148 (2007/10/03)
One- and two-dimensional NMR-spectroscopic data of eight 6,6′disubstituted 2,2′-bipyridines, prepared by the N-oxidation route, were used to confirm their structures. These key compounds in supramolecular construction lead to the characterization of larger oligo(bipyridine) building blocks. Furthermore some related reactions are described which lead to unsymmetrically functionalized bipyridines or can be used for the purification of bishydroxy compounds.
