Potassium 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. 

The dielectric constant of a 5 per cent. soln. of potassium hydroxide is 7 12.50 Potassium hydroxide is diamagnetic61 its magnetic susceptibility is — 0-35 xlO-6 at 22°. 

V(urea)6]I3 crystallizes from a solution of the sulfate on adding potassium iodide. The oxygen atoms of the urea molecules form an octahedron twisted T about the three-fold axis with V—O lengths of 1.98 A.286 The magnetic susceptibility of the iodide and perchlorate salts... 

The Ozonide Ion.—The red crystalline substance potassium ozonide, KO3, is obtained by recrystallizing from liquid ammonia the product of reaction of ozone and potassium hydroxide.47 The corresponding ozonides NaO and CsO hasre been shown48 to have magnetic susceptibility corresponding to the presence of the OjT ion with one odd electron. The electronic structure of the ozonide ion is... 

Another ternary system is K2Ba4C60, which is synthesised by reaction of excess potassium with preformed Ba4C60 [68]. Figure 19 shows the temperature dependence of the magnetic susceptibility of Ba4C60, K3Ba3C60 and K2Ba4C60 (Tc=6.7 K,... 

The physical properties of the aqueous solutions were studied by Bucknall and coworkers 14 Ray and Bharls studied the magnetic susceptibility of the hexachloro complex. Potassium pentachloroaquomolybdate(III) exists as rhombic crystals and is isomorphous with potassium pentachloroaquoferrate(III).16 Potassium hexachloromo-lybdate(III) has been used for the preparation of potassium hexathiocyanatomolybdate(III), potassium heptacyano-aquomolybdate(III),17and potassium octacyanomolybdate-(IV).18... 

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 . ... 

Figure 9.17 Plot of the in-phase and out-of-phase AC magnetic susceptibility for the complex [SmFe] at driving frequency of 199 Hz and 355 Hz [98]. (Reprinted with permission from B. Yan, and Z. Chen, Cyano-bridged aqua(A, Al-dimethylacetamide)(cyanoiron)lanthanides from samarium, gadolinium, or holmium nitrate and potassium hexacyanoferrate crystal structures and magnetochemistry, Helvetica Chimica Acta, 2001, 84, 817-829 (Figure 7). Wiley-VCH Verlag GmbH Co. KGaA.)...

Potassium, rubidium and caesium also form oxides of the composition M2O3. When white KgOg is heated in oxygen at very low pressure red K2O3 is produced. The magnetic susceptibilities of RbgOg and CsgOg are consistent with the presence of superoxide ions, Og , and peroxide ions, Og , in the proportion 2 1. 

Magnetic susceptibility (I8°) —0.31 x 10-( cgs. Hardness (Mohs) 2,3. Modulus of elasticity 6,000,000 psi. Specific heat (solid) 0.047 cal/g/"C. Thermal conductivity 0.014 at 20°, Burns in air with a greenish -blue flame, forming the dioxide. Insol in water, in benzene, in carbon disulfide. Not attacked by hydrochloric acid reacts with nitric acid with coned or fuming sulfuric acids, forming a red soln in presence of air dissolves in potassium hydroxide with formation of a deep-red sola. Combines with the halogens does not react with sulfur or selenium. 

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