Topic
Tetrahedral molecular geometry
About: Tetrahedral molecular geometry is a research topic. Over the lifetime, 1795 publications have been published within this topic receiving 30706 citations.
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TL;DR: A new chalcogenide Na2ZnSnS4 has been successfully synthesized by using Na2S2 as reactive flux and first-principles calculation results reveal that the valence band maximum and conduction band minimum are mainly composed of S3p, Zn 3d orbitals and Sn 5s, S 3p orbitals, respectively.
Abstract: A new chalcogenide Na2ZnSnS4 has been successfully synthesized by using Na2S2 as reactive flux. Na2ZnSnS4 crystallizes in the tetragonal system with space group of I4. Its cell parameters are a = 6.4835(6) A and c = 9.134(1) A. The structure is a derivative of AgGaS2, in which the Ag+ ions are replaced by Na+ ions and the Ga3+ ions are replaced by Zn2+ and Sn4+ ions. All three cations are in seriously distorted tetrahedral geometry with a distortion factor (η = c/ a) of 1.4. Optical measurements show that the Na2ZnSnS4 powder sample has a large transparent range from 0.8 to 25 μm and a wide band gap of 3.1 eV. It exhibits large second-harmonic generation intensity of 0.9 × AgGaS2 in the grain size range from 41 to 74 μm. First-principles calculation results reveal that the valence band maximum and conduction band minimum are mainly composed of S 3p, Zn 3d orbitals and Sn 5s, S 3p orbitals, respectively.
25 citations
TL;DR: In this article, two zinc(II) complexes were synthesized and characterized by elemental analysis, electrical conductivities, IR, UV-Vis spectral measurements and X-ray single crystal diffraction.
25 citations
TL;DR: In this paper, the mesityl derivative Ga(C6Me3H2)C12 was characterized as a unique one dimensional polymer in which planar Ga(c6me3H 2)C1 units with distorted tetrahedral geometry were linked by bridging chloride ligands.
25 citations
TL;DR: In this paper, a new copper(I) mixed-ligand complexes 1−4 of the formula Cu(N−N)PR3X, where N−N = 1,10-phenanthroline (phen), 2,2′-bipyridine (bpy), 5,5′-dimethyl-2,2'n 2, 2'n-, 2 'n-, 3'n', and 5 'n'dimbpy (5,5'n), have been synthesized and characterized by EA, IR, NMR
25 citations
TL;DR: In this paper, the reactions of ZnX2 and CdX2 with the biheteroaromatic ligand 2-(2′-pyridyl)quinoxaline (L) were studied in ethanolic solutions.
25 citations