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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the structure of ligand and the mode of bonding and overall geometry of the complexes have been inferred through UV-vis, IR, 1 H/13 C NMR, mass, elemental analyses, spectral techniques as well as molar conductivities and magnetic moment data.
13 citations
TL;DR: In this paper, two Schiff base ligands (HL1 and HL2) were synthesized by a condensation reaction of halogenated salicylaldehyde and amantadine.
Abstract: By a condensation reaction of halogenated salicylaldehyde and amantadine, two new Schiff base ligands (HL1 and HL2) were synthesized, respectively. A followed mixture of the ligands and zinc(II) chloride in the presence of NaOH in an alcoholic medium brought out two novel complexes (ZnL21) (I) and (ZnL22 (II). These two complexes were characterized by the means of melting point, elemental analysis, IR, UV-Vis, 1H NMR, molar conductance and single-crystal X-ray diffraction analysis. X-ray diffraction analysis reveals that I crystallizes in monoclinic system, P21/c space group, a = 9.7812(5), b = 25.6198(12), c = 27.7381(18) A, β = 105.881(4), F(000) = 1416, R1 = 0.0731, wR2 = 0.1147; II crystallizes in orthorhombic system, Pbca space group, a = 11.1717(10), b = 20.5888(15), c = 27.7381(18) A, F(000) = 2976, R1 = 0.1341, wR2 = 0.1410. Both in I and II, the central zinc(II) atom is four-coordinated via two nitrogen atoms and two oxygen atoms from the corresponding Schiff base ligands, forming a distorted tetrahedral geometry.
13 citations
TL;DR: In this paper, the tetrahedral sheets contain continuous T-O linkages, where T is normally Si or Al, and the apical oxygen forms part of the adjacent octahedral sheet, with six coordinated cations surrounded by oxygens and hydroxyls.
Abstract: Clay minerals are an important group of naturally occurring minerals found in soils and sediments. They have a sheet-like structure and the order of the sheets as well as the sheet composition contributes to the properties of the clay mineral. The tetrahedral sheets contain continuous T-O linkages with tetrahedral geometry, where T is normally Si or Al [1]. The apical oxygen of each tetrahedron forms part of the adjacent octahedral sheet, with six coordinated cations surrounded by oxygens and hydroxyls. If the cation is trivalent (eg. Al
13 citations
TL;DR: Two cobalt metal-organic frameworks constructed from 1,2,4,5-benzenetetracarboxylic acid and flexible bis(5,6-dimethylbenzimidazole) ligands, namely {[Co1.5(Hbtec)(L1)1]·(H2O)}, have been hydrothermally synthesized by physicochemical and spectroscopic methods and by single-crystal X-ray diffraction.
Abstract: Two cobalt(II) metal–organic frameworks constructed from 1,2,4,5-benzenetetracarboxylic acid and flexible bis(5,6-dimethylbenzimidazole) ligands, namely {[Co1.5(Hbtec)(L1)1.5(H2O)2]·(H2O)}
n
and {[Co(H2btec)(L2)]·(L2)0.5(H2O)2}
n
[L1 = 1,4-bis(5,6-dimethylbenzimidazole-1-ylmethyl)benzene, H4btec = 1,2,4,5-benzenetetracarboxylic acid, L2 = 1,4-bis(5,6-dimethylbenzimidazole)butane], have been hydrothermally synthesized and characterized by physicochemical and spectroscopic methods and by single-crystal X-ray diffraction. The cobalt atoms present different coordination environments, with trigonal-bipyramidal and octahedral geometries in 1, and a tetrahedral geometry in 2. Complex 1 has a 2D (6,3) wave like layer structure, which is further linked by hydrogen bonding to generate a 3D supramolecular architecture. It is a trinodal (4,4,4)-connected topology with a point symbol of {42·6·83}2{42·62·82}{43·63}2. Complex 2 is a 2D (6,3) honeycomb net, further linked into a 3D supramolecular network via two modes of π–π stacking interactions. The degradation of methyl orange in a Fenton-like process using complexes 1 and 2 as catalysts has been investigated.
13 citations
13 citations