Product of the reaction of cupric hexafluoroacetylacetonate with 1-hydroxy-3-imidazolines as immediate nitroxyl radical precursors

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1693–1694, July, 1988.     

Structure and phase composition of the intermetallide Ni3Al+0.5 at.% B synthesized under pressure

We have used x-ray structural analysis, together with transmission and scanning electron microscopy, to study the phase composition, structure, and elemental distribution in the intermetallide Ni₃Al+0.5 at.% B, produced by self-propagating high-temperature synthesis under pressure. It is shown that the synthesized material is an ordered alloy of the type L1₂. The phase composition of the alloy Ni₃Al+0.5 at.% B is represented by the phases Ni₃Al (the fundamental phase), grains of a layered NiAl composition, and inclusions of Ni₃B. The latter is found inside the Ni₃Al grains, in the form of surrounded particles, and at dislocations and at grain boundaries in the NiAl phase. Institute for the Physics of Strength and Materials Production. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 9, pp. 59–64, September, 1996.     

Theory of spin-peierls transitions in chains of exchange clusters

A theoretical approach to the analysis of magnetostructural phase transitions of chain polymeric heterospin complexes is suggested. The approach is based on a model of the spin-Peierls transition in chains of exchange clusters. The chain elasticity parameter is found to be a main factor determining the order of phase transition.     

An X-ray photoelectron study of the electronic structure of Cu(II) complexes with dia- and paramagnetic derivatives of 2-imidazoline

The electronic structure of free radicals and Cu(II) complexes with the nitronyl nitroxide radical and aminonitrone is studied by X-ray photoelectron spectroscopy (XPS). N1s XPS spectra of nitrogen atoms of Cu(II) complexes with aminonitrones confirm the diamagnetic nature of the ligands. The binding energies of the main peak and the intense satellite structure in the Cu2p _3/2,1/2 spectra of the complexes under study correspond to the Cu(II) state. The structure of the satellite in the Cu2p _3/2,1/2 spectrum depends on the environment of the metal ion.     

Determination of the ultra long range spin-spin coupling constants using overall line shape analysis in the1H NMR spectra of fullerene-C60 cycloadducts with 1-(4-nitrophenyl)-3-phenylnitrile ylide

On the basis of the overall signal line shape in the¹H NMR spectra of [6,6]-closed and [5,6]-open fullerene-C₆₀ cycloadducts with 1-(4-nitrophenyl)-3-phenylnitrile ylide we determined the values of the long range spin-spin coupling for the aliphatic proton of the heterocyclic fragment with the aromatic protons.M. V. Lomonosov State University, Moscow 119899, Russia. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1500–1505, November, 1999.