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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 zinc(II) coordination polymer, Zn4(o-bda)4(p-pbim)4] n (1) as mentioned in this paper, has been synthesized by hydrothermal method and characterized by elemental analysis, IR, TG, photoluminescence and X-ray single crystal diffraction.
Abstract: A zinc(II) coordination polymer, [Zn4(o-bda)4(p-pbim)4] n (1) (p-pbim = 4-pyridylbenzimidazole, o-bda2− = o-phenylenediacetic acid dianion), has been synthesized by hydrothermal method and characterized by elemental analysis, IR, TG, photoluminescence and X-ray single crystal diffraction. Complex 1 crystallizes in a monoclinic system and space group P21 /n, with a = 14.231(3) A, b = 16.257(4) A, c = 16.794(4) A, β = 100.262(1)°, and Z = 8; R 1 for 6475 observed reflections [I > 2σ(I)] was 0.0420. Complex 1 shows a bi-chain structure fabricated by the tetranuclear zinc unit. Two zinc(II) ions are five coordinate with distorted trigonal-bipyramid geometry; the other two zinc(II) ions are four coordinate with distorted tetrahedral geometry. Complex 1 builds the 1-D bi-chain structure with two different subrings A and B, which are 32-member and 14-member rings, respectively. There exists a 2-D supramolecular network linked by hydrogen-bonding interactions (2.695 and 2.807 A). A 3-D supramolecular network is f...
25 citations
TL;DR: A new series of Co(II), Ni (II) and Cu(II) complexes of (Z)-2-oxo-2-(phenylamino)-N'-(1-(pyridin-2-yl)ethylidene)acetohydrazide (H2OPPAH) have been prepared and characterized by conventional techniques and spectral data indicated that the ligand acts as neutral or mononegative NNO tridentate.
25 citations
TL;DR: The first examples of germaester complexes stabilized through aminotroponiminate (ATI) ligands are reported in this article, where the authors showed that these compounds serve as starting materials for the synthesis of the aforementioned ester complexes.
25 citations
TL;DR: Two complexes of dimethyl pyridine-2,6-dicarboxylate (L), [CdL3][CdI4] (1) and [Ag(L)NO3]n (2) were prepared and identified by elemental analysis, FT-IR, Raman and 1H NMR spectroscopy, cyclic voltammetry, and single-crystal X-ray diffraction as mentioned in this paper.
Abstract: Two complexes of dimethyl pyridine-2,6-dicarboxylate (L), [CdL3][CdI4] (1) and [Ag(L)NO3]n (2) were prepared and identified by elemental analysis, FT-IR, Raman and 1H NMR spectroscopy, cyclic voltammetry, and single-crystal X-ray diffraction. The crystal structure of 1 contains both complex cation and complex anion of the metal. Cadmium in [CdL3]2+, coordinated by three nitrogens and six oxygens, has a distorted tricapped trigonal prismatic geometry while [CdI4]2−, with four coordinated iodides, has a slightly distorted tetrahedral geometry. In the crystal structure of 2, silver has distorted tetrahedral geometry by coordination of nitrogen and three oxygens. One oxygen of nitrate in 2 bridges two silvers. Extension of these bridges forms a 1-D coordination polymer. Cyclic voltammetry of L reveals two reduction steps which are shifted after coordination in 1, while no significant shifts are observed in 2. Hydrogen bonds including C–H I, C–H O and C–H C and short interactions such as C I, , and O are compa...
25 citations
TL;DR: A one-pot protocol has been developed to obtain a series of luminescent heteroleptic diarylborinic complexes bearing the 2-fluoro-3-pyridyl and another aryl group attached to the boron atom chelated with a simple or functionalized 8-oxyquinolinato ligand.
Abstract: A one-pot protocol has been developed to obtain a series of luminescent heteroleptic diarylborinic complexes bearing the 2-fluoro-3-pyridyl and another aryl group attached to the boron atom chelated with a simple or functionalized 8-oxyquinolinato ligand. The tetrahedral geometry around the boron atom in all compounds has been established by the 11B NMR spectroscopy and/or X-ray diffraction technique. In the solution, the obtained complexes have emission maxima ranging from 502 to 525 nm at room temperature. The quantum yield of emission significantly depends on the type and position of the substituents in the 8-oxyquinolinato ligands and aryl rings. An interpretation of the experimental UV–vis absorption and emission spectral data is supported by theoretical calculations of the frontier molecular orbitals. Marcus theory was used to theoretically evaluate charge-transport properties of the obtained complexes.
25 citations