Quaternary Tetrahedral Structure Compounds with Ordered Wurtzite Superstructures

A discretization for the Schwarzschild spacetime manifold is introduced and investigated. It is shown that the discreteness of the area of space shown in loop gravity leads to a tetrahedral structure characterizing the Schwarzschild manifold.

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X-ray powder diffraction study of ZnGa2Te4

Powder Diffraction ◽

10.1154/1.1424263 ◽

2002 ◽

Vol 17 (1) ◽

pp. 41-43 ◽

Cited By ~ 13

Author(s):

Rashmi ◽

U. Dhawan

Keyword(s):

Diffraction Study ◽

Powder Diffraction ◽

Diffraction Data ◽

Unit Cell ◽

Powder Diffraction Data ◽

Unit Cell Parameters ◽

Tetrahedral Structure ◽

X Ray ◽

Cell Parameters ◽

Ray Density

ZnGa2Te4 was found to crystallize in a defect tetrahedral structure with possible space group I4(82) with Z=2. Complete X-ray powder diffraction data were obtained and the unit cell parameters a and c and X-ray density were calculated. These were a=0.5930(1) nm, c=1.1859(3) nm, and Dx=5.7×103 kg/m3.

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Preparation and Spectral Study of New Complexes of Some Metal Ions with 3,5-Dimethyl-1H-Pyrazol-1-yl Phenyl Methanone

Baghdad Science Journal ◽

10.21123/bsj.8.4.1005-1011 ◽

2011 ◽

Vol 8 (4) ◽

pp. 1005-1011

Author(s):

Baghdad Science Journal

Keyword(s):

Magnetic Susceptibility ◽

Elemental Analysis ◽

Room Temperature ◽

Molar Conductivity ◽

The Other ◽

Octahedral Structure ◽

Tetrahedral Structure ◽

Visible Spectra ◽

Ft Ir ◽

Uv Visible

Many complexes of 3,5-dimethyl-1H-pyrazol-1-yl phenyl methanone with Cr(III), Co(II), Ni(II), Cu(II) and Cd(II) were synthesized and characterized by FT-IR, UV/visible spectra, elemental analysis, room temperature magnetic susceptibility and molar conductivity. Cd(II) complex was expected to have tetrahedral structure while all the other complexes were expected to have an octahedral structure.

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"ANTI-HALOGEN" BONDS AS A FACTOR DETERMINING THE TETRAHEDRAL STRUCTURE OF COPPER IN ITS COMPLEXES WITH (5Z, 5'Z)-2,2'- (ETHANE-1,2-DIYLDISULFANYLDIYL)BIS(5-(2-PYRIDYLMETHYLENE)-3-ALLYL-3,5-DIHYDRO- 4H-IMIDAZOLE-4-ONE)

National Association of Scientists ◽

10.31618/nas.2413-5291.2021.2.74.522 ◽

2021 ◽

Vol 2 (74) ◽

pp. 38-41

Author(s):

A. Al-Khazraji ◽

I. Dudkin ◽

E. Ofitserov ◽

A. Finko ◽

E. Beloglazkina

Keyword(s):

Electron Density ◽

Copper Atom ◽

Halogen Bond ◽

Halogen Bonds ◽

Tetrahedral Structure ◽

Angle Of Rotation

Analysis of the valence angles of the Si and carbon atoms of the C-S bond in the obtained complexes of CiVg2 c (5Z, 5'Z)-2,2’-(ethane-1,2-diyldisulfanyldiyl)bis(5-(2-pyridylmethylene)-3-allyl-3,5-dihydro-4Нimidazole-4-one) unambiguously indicates the determinant effect of the non-valent interactions of the electron density centroids of the NEP of bromine atoms and sulfur atoms, leading to a change in the plane structure of Cu(II) towards tetrahedral with a likely change in the magnetochemical properties of the copper atom, and the angle of rotation of the planes is almost 900. This interaction is the opposite of what is commonly called a halogen bond. In this case, it is an "anti-halogen" bond.

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