Sodium magnetic susceptibility

The ESR spectrum of the pyridazine radical anion, generated by the action of sodium or potassium, has been reported, and oxidation of 6-hydroxypyridazin-3(2//)-one with cerium(IV) sulfate in sulfuric acid results in an intense ESR spectrum (79TL2821). The self-diffusion coefficient and activation energy, the half-wave potential (-2.16 eV) magnetic susceptibility and room temperature fluorescence in-solution (Amax = 23 800cm life time 2.6 X 10 s) are reported. 

Solvated electrons were first produced in liquid ammonia when Weyl (1864) dissolved sodium and potassium in it the solution has an intense blue color. Cady (1897) found the solution conducts electricity, attributed by Kraus (1908) to an electron in a solvent atmosphere. Other workers discovered solvated electrons in such polar liquids as methylamine, alcohols, and ethers (Moissan, 1889 Scott et al, 1936). Finally, Freed and Sugarman (1943) showed that in a dilute metal—ammonia solution, the magnetic susceptibility corresponds to one unpaired spin per dissolved metal atom. 

Examinations of other physical properties of pyridazine include the ESR spectrum of pyridazine radical anion (obtained with pyridazine and sodium or potassium in dimethoxyethane or tetra-hydrofuran, the self-diffusion coefficient and activation energy, the half-wave potential (-2.16V), and magnetic susceptibility. Pyridazine was reported not to fluoresce and no luminiscence could be observed even under very long exposures. More recently, room-temperature fluorescence in solution is reported to be at 23,800 cm (max.), with a life time of 2.6 x 10 . ... 

An infrared spectrum of the tetrafluoride in a Nujol mull, with sodium chloride and caesium bromide plates, had peaks at 675 cm." (sharp) and at 576 cm." (broad). A magnetic susceptibility measurement, at 23° by the Gouy technique, showed it to be diamagnetic. 

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