Evans, Jeffrey C. published the artcileAn electron spin resonance, ENDOR, and TRIPLE resonance study of methyl-substituted N,N’-diphenyl-4,4′-bipyridylium dichloride radical cations, COA of Formula: C22H18Cl2N2, the publication is Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) (1985), 315-18, database is CAplus.
The ESR and ENDOR spectra of the radical cations of the bipyridylium dichlorides I (R = H, Me, R1 = R2 = R3 = H; R = R2 = R3 = H, R1 = Me; R = R1 = R3 = H, R2 = Me; R = R2 = R3 = Me, R1 = H) (II–VI, resp.) in MeOH were studied over a range of temperatures Values for the hyperfine coupling constants at -40° are given. The radical cation concentrations of II–V decreased with decreasing temperature, this change being reversible, whereas that of VI did not. The reversible change with temperature is explained in terms of a monomer-dimer equilibrium, and the absence of such an equilibrium for VI is due to lack of planarity of the mol., because of steric hindrance between the Me groups and the pyridyl ortho protons. The thermodn. constants ΔG°, ΔH°, and ΔS°, obtained for the dimerization equilibrium, are reported.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999) published new progress about 47369-00-6. 47369-00-6 belongs to pyridine-derivatives, auxiliary class Pyridine,Salt,Benzene,Organic ligands for MOF materials,Nitrogen containing MOF ligands,Nitrogen containing MOF ligands, name is 1,1′-Diphenyl-[4,4′-bipyridine]-1,1′-diium chloride, and the molecular formula is C22H18Cl2N2, COA of Formula: C22H18Cl2N2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem