6- Methoxy-2,2 -bipyridyl

Kinetic parameters k, often also and AS, occasionally AV ) for formation and dissociation of several pentacyanoferrate(II) complexes [Fe(CN)5L]" have been established. Ligands L include several S- and A-donor heterocycles,4-methyl- and 4-amino-pyridines, a series of alkylamines, 3- and 4-hydroxy- and 3- and 4-methoxy-pyridines, several amino acids, nicotinamide, " 4-pyridine aldoxime, 3-Me and 3-Ph sydnones, several bis-pyridine ligands,neutral, protonated, and methylated 4,4 -bipyridyl, 1,2-bis(4-pyridyl)ethane and traTO-l,2-bis0-pyridyl)ethene, pyrazine- 4,4 -bipyridyl- and bis(4-pyridyl)ethyne-pentaammine-cobalt(III), edta-ruthenium(III), and pentaammineruthenium-(II)and-(III) complexes of... 

Perfluoro-2,2 -bipyridyl (12) with sodium methoxide yields heptafluoro-4-methoxy-2,2 -bi-pyridyl and hexafluoro-4,4 -dimethoxy-2,2 -bipyridyl.124... 

Armes et al. have intensively studied the aqueous ATRP of various monomers. Using CuBr/bpy as a catalyst, methacrylic acid polymerization has been shown to be possible in aqueous media at pH values between 6 and 9 [200]. The polymerization occurs very slowly (80% conversion after 21 h at 90 °C, [monomer] [initiator] [catalyst] = 28 1 1) yielding polymers with low molecular weight (M = 2.9xl0 g mol ) and a polydispersity of Mw/Mn = 1.3. This is probably due to a loss of catalytic species occurring from the competitive coordination of carboxylic acids to the copper centers, as mentioned for the case of acrylic acid. The choice of pH is important at pH <6, protonation of the bipyridyl ligand occurs, resulting in loss of control. The choice of initiator is equally important the polymerization is only controlled when the methoxy-capped macroinitiator 46 is used. 

The synthesis of 6,6 -bis-(5,6-diethyl[l,2,4]triazin-3-yl)-2,2-bipyridyl, the first example of a new class of tetradentate reagent for the efficient separation of americiumflll) and europium(III) has been described <05ICC239>. The synthesis and characterization (including X-ray) of Cd(II), Zn(II), Pb(II), Co(III) and Ni(II) complexes of 5-methoxy-5,6-diphenyl-4,5-dihydro-2/f-[l,2,4]triazine-3-thione have been reported <05POL1435>. 

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