110462-45-8Relevant articles and documents
The Mode of Co-ordination of the Quaternised 2,4'-Bipyridinium Cation. Crystal Structures of Trichloro(1'-methyl-2,4'-bipyridinium-κN1)platinum(II) Dihydrate and Dichloro(1'-methyl-2,4'-bipyridin-3'-ylium-κC3',N1)platinum(II)
Castan, Paule,Dahan, Francoise,Wimmer, Smita,Wimmer, Franz L.
, p. 2971 - 2977 (1990)
The 1'-methyl-2,4'-bipyridinium ion (2,4'-mbipy+) reacts with K2 (M = PtII or PdII; X = Cl or Br) to give the zwitterionic compounds .The crystal and molecular structure of has been determined by single-crystal X-ray analysis.The compound crystallizes in the monocyclic system, space group P21/c with a = 12.319(2), b = 9.359(1), c = 13.665(2) Angstroem, and β = 107.90(1) deg.From , cyclometallated 3X2>, (M = Pt or Pd, X = Cl or Br, L3 = 1'-methyl-2,4'-bipyridin-3'-ylium) has been synthesized and spectroscopically characterized.The crystal and molecular structure of 3Cl2> has been determined by single-crystal X-ray analysis.The compound crystallizes in the orthorhombic system, space group Pbca, a = 7.643(1), b = 17.726(2), and c = 17.142(2) Angstroem. 2,4'-Bipyridyl (2,4'-bipy) reacts with PdX2 (X = Cl or O2CMe) to yield trans- and with K2 to give cis-.Heating trans- in acetic acid gives the cyclometallated dimer 2(μ-O2CMe)>2> (L2 = 2,4'-bipyridin-3-ylium).
Synthesis and electrochemical properties of bis(bipyridine)ruthenium(II) complexes bearing pyridinyl- and pyridinylidene ligands induced by cyclometalation of N′-methylated bipyridinium analogs
Koizumi, Take-Aki,Tomon, Takashi,Tanaka, Koji
, p. 1258 - 1264 (2005)
Ruthenium complexes with bipyridine-analogous quaternized (N,C) bidentate ligands [RuL(bpy)2](PF6)2 (bpy = 2,2′-bipyridine, (1), L = L1 = N′-methyl-2,4′- bipyridinium; (2), L = L2 = N′-methyl-2,3′-bipyridinium) were synthesized and characterized. The structure of complex 2 was determined by the X-ray structure analysis. The 13C{1H} NMR spectroscopic and cyclic voltammetric studies indicate that the coordination modes of these ligands are quite different, that is, the C-coordinated rings of (N,C)-ligands in 1 and 2 are linked to ruthenium(II) with a pyridinium manner and a pyridinylidene one, respectively. The ligand-localized redox potentials of 1 and 2 also revealed the substantial difference in the electron donating ability of both ligands.
From bipyridines to tobacco alkaloids and related compounds
Plaquevent, Jean-Christophe,Chichaoui, Ilhame
, p. 369 - 379 (2007/10/03)
Starting from structural considerations which led to the hypothesis that a chemical relationship could exist between two families of natural compounds (mainly pyridinic and pyrrolidinic alkaloids), experiments were carried out in order to establish a correlation route between the two studied classes. Of special interest was the central position of nicotine in these studies, and the main part of this work was devoted to the synthesis of nicotine starting from bipyridines. It was thus necessary to determine the conditions for selective reactions on one aromatic ring of bipyridines (N-methylation, N-oxidation and reduction of the heterocycle). Ring contraction procedure allowed us to obtain nicotine from the parent compound (3,3′-bipyridine). Complementary studies yielded various isomers of piperidinylpyridines (hexahydro derivatives of bipyridines) in a regiochemically controlled manner by means of original methods. Elsevier,.
