Synthesis and characterization of new complexes between sodium monoalkyl benzeneazophosphonates and dibenzo-18-crown-6

A new series of crystalline complexes of sodium monoethyl ester and sodium monobutyl ester of [α-(4-benzeneazoanilino)-N-benzyl]phosphonic acid,     

Relativistic generalization of dynamic equation for Jost function

A system of dynamic equations for the simultaneous determination of the scattering amplitude and the relativistic Jost function is derived from the Mandelstam representation and the unitarity condition. The relativistic generalization of the de Alfaro, Regge and Rossetti dynamic equation for the Jost function is given.     

Beitrag zur Theorie der Temperaturfaktoren des Vibrationsspektrum der Moleküle

An attempt is made to derive general expressions for temperature factors to which the intensities of the absorption bands of the vibrational spectrum of molecules are directly proportional. For the sake of simplicity, the process of induced emission is neglected. The temperature factor for the line corresponding to the transition (v ₁,v ₂,...,v _s ) (v ₁+p ₁,v ₂+P ₂,...,v _s +p _s ) with multiplicity ₁,₂, ..., is given by expression (3) and the temperature factor for the band is given by expression (4). These relations were used to calculate the ratios of the temperature factors for the case of double and triple degenerate energy levels and satisfactory agreement with the experimental results studied in paper [2] was obtained.

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Abschließend möchte ich Herrn Ing. A. Vako für die Veranlassung zu dieser Arbeit bestens danken.     

Dislocation stress fields in α-Fe

The stress components based on anisotropic elasticity are found for edge and screw dislocations in α-Fe. The method of Eshelby, Read and Shockley is used.     

Über konvexe Multiplikatoren bei Fourier-Reihen

Ohne Zusammenfassung     

Double quantum transitions in free radicals

The observation of double quantum transitions on three kinds of free radicals (DPPH, DPANO, ultramarine) at temperatures of liquid nitrogen is described. Signals having an absorption and emission character were observed in the 12-5 MHz–18 MHz frequency band in the direction parallel to the external magnetic fieldH ₀ and their dependence on different parameters was studied.Bloch equations were solved for two mutually perpendicular high-frequency fields and expressions were found for the components of dynamic susceptibility in theH ₀ direction. The experiments agree with theory.The possibility of using double quantum transitions for measuring relaxation times is discussed.

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(DPPH, DPANO, ) . 12,5MHz–18MHz H ₀, ; . H ₀. . .

     

Improved synthesis of arachno-6,9-C2B8H14 and its halogenation under electrophilic conditions

A convenient synthesis of arachno-6,9-C₂B₈H₁₄, based on the reduction of nido-5,6-C₂B₈H₁₂ with sodium tetrahydroborate, is reported. Electrophilic halogenation of the former carborane produced a series of 1-X-6,9-C₂B₈H₁₃ (X = Cl, Br and I) derivatives whose constitution was established on the basis of their ¹H and ¹¹B NMR spectra.     

KL − KS mass difference and quark models

The matrix element $\text{〈}\text{K}\text{?}{}^0\text{|H}{}_{\mathrm{<mtext>W</mtext>}}\text{|}\text{K}{}^0\text{〉}$ is calculated in the quark MIT bag model and in several relativized versions of the quark harmonic-oscillator models for hadrons. The results of the MIT bag model depend strongly on the particular choice of parameters, while the results of the harmonic-oscillator model are relatively stable on the variation of model parameters. The harmonic-oscillator model which takes into account the c.m. motion (the RHO model) is in reasonably good agreement with the vacuum-saturation value.