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41.
Pavlyuk O. V. Mykhalichko B. M. Mys'kiv M. G. 《Russian Journal of Coordination Chemistry》2004,30(3):159-183
Stereospecific behavior of allyl derivatives and acetylenes in CuX -complexes (X = Cl-, Br-, NO3
-, BF4
-, 1/2SiF6
2-, 1/2SO4
2-) is studied by X-ray diffraction analysis. The influence of donor atoms N, S, and O and of the Cu-X bond polarization on the -complex formation is considered. The efficiency of Cu-(C=C) and Cu-(CC) -interaction and specific behavior of mono- and disubstituted acetylenes with respect to Cu(I) are compared. 相似文献
42.
Yurii Slyvka Evgeny Goreshnik Oleksii Pavlyuk Marian Mys’kiv 《Central European Journal of Chemistry》2013,11(12):1875-1901
In this review an exhaustive crystallochemical analysis of copper(I) π-complexes with allyl derivatives of heterocyclic compounds has been performed. Structural genesis of inorganic constituents starting from the simplest units to the most complicated aggregates was considered taking into account the specific role of Cu-(C=C) interaction, the construction of the organic ligands, the basicity and nucleophilic activity of their heteroatoms, as well as olefin Cu(I) π-complex preparation route. 相似文献
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Temperature distribution in the Nd- and Yb- doped YAG and KGdW laser crystals under flashlamp- and diode-pumping was characterized by means of finite element analysis. For KGdW, two laser crystal orientations were considered for light propagation along the Np and Ng optical indicatrix axes, taking into account the anisotropy of thermal conductivity coefficient. The influence of the cooling conditions, pump spot size and dopant concentration on the temperature distribution was analyzed. For flashlamp-pumping conditions, the applicability of the quasi-steady-state model is discussed. The main concerns in the thermal management of KGdW laser host is the relatively low thermal conductivity that results in poor cooling and significant absorption coefficients under diode pumping that result in highly non-uniform volumetric heat deposition. “Athermal” Ng-cut KGdW crystal was found to produce higher temperature gradients that the “standard” Np-cut one, that should results in higher internal stresses and higher probability of thermally-induced cracks. 相似文献
47.
P.?A.?Loiko K.?V.?YumashevEmail author N.?V.?Kuleshov A.?A.?Pavlyuk 《Applied physics. B, Lasers and optics》2012,106(4):881-886
Thermal lensing has been studied by a probe beam technique in flashlamp-pumped Nd:KGdW laser rods with rod axes positioned
in the N
p–N
g plane and making different angles with the N
g optical indicatrix axis. It was found that the orientation of principal meridional planes of the astigmatic thermal lens
in Nd:KGdW corresponds to the directions with maximum and minimum values of thermal-expansion coefficient in the plane perpendicular
to the rod axis. The athermal Nd:KGdW laser crystal orientation defined as orientation with weak positive near spherical thermal
lens has been determined to make an angle of 30○–40○ with the N
g axis for light polarization E∥N
m. 相似文献
48.
Andrij Stetskiv Renata Misztal Volodymyr Pavlyuk 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(8):i60-i64
The synthesis and characterization of a new ternary dilanthanum lithium hexagermanide, La2LiGe6−x (x = 0.21), belonging to the Pr2LiGe6 structure type, and a quaternary dilanthanum lithium tetragermanium disilicide, La2LiGe4Si2, which crystallizes as an ordered variant of this type, are reported. In both structures, Li is on a site of mmm symmetry. All other atoms are on sites of m2m symmetry. These structures are new representatives of a homologous linear structure series based on structural fragments of the AlB2, CaF2 and ZrSi2 structure types. The observed 17‐vertex polyhedra are typical for La atoms and the environment of the Li atom is cubic. Two Ge atoms are enclosed in a tetragonal prism with one added atom (nine‐vertex polyhedron). The trigonal prismatic coordination is typical for Ge or Si atoms. The metallic nature of the bonding is indicated by the interatomic distances and electronic structure calculations. 相似文献
49.
Ewa Rozycka‐Sokolowska Bernard Marciniak Volodymyr Pavlyuk Euzebiusz Dziwinski 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(1):o45-o46
Molecules of the title compound [systematic name: 2,4′‐(propane‐2,2‐diyl)diphenol], C15H16O2, are linked through intermolecular O—H·O hydrogen bonds into infinite zigzag chains. The molecular structure is compared with that of the related compound 4,4′‐isopropylidenediphenol. 相似文献
50.
Pavlyuk D. E. Gundala S. Kovalev I. S. Kopchuk D. S. Krinochkin A. P. Budeev A. V. Zyryanov G. V. Venkatapuram P. Rusinov V. L. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2019,55(3):409-411
Russian Journal of Organic Chemistry - The Diels-Alder reactions of perylene (diene) with 1,2-didehydrobenzene and 4,5-dimethoxy-1,2-didehydrobenzene (dienophiles) generated in situ by two methods... 相似文献