Quantum-chemical interpretation of the reorientation of dialkyl-<Emphasis Type="Italic">cis</Emphasis>-9,10-dihydroanthracene-9,10-endofumarates on a silver-containing stationary phase

The chromatographic behavior of a series of dialkyl-cis-9,10-dihydroanthracene-9,10-endofumarates on a silver-containing stationary phase with various mobile phase compositions and at various temperatures was investigated by liquid chromatography. The observed relationships indicate reorientation of the analytes on the surface of the adsorbent with increase in temperature. This is explained by the formation of two types of chelate complexes similar in energy between the analytes and the silver ions. It agrees well with data calculated by the B3LYP/LANL2DZ method.__________Translated from Teoreticheskaya i Éksperimentalnaya Khimiya, Vol. 41, No. 1, pp. 1–6, January–February, 2005.     

Effect of a magnetic field on the damping of oscillations in deformed nickel and iron

A study was made of the effect of a magnetic field on the restoration of internal friction in polycrystalline nickel after brief plastic torsional deformation. The experimental results can be explained in terms of a redistribution of the ferromagnetic and nonferromagnetic internal-friction components in the magnetic field and in terms of a relaxation of the elastic stress which accompanies the inhomogeneous plastic deformation during the restoration of the domain structure.