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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01 Jan 2014
TL;DR: In this article, the Schiff base behaves as a bidentate ligand and it coordinates through the oxygen atom of the deprotonated phenolic group and the nitrogen of imine group.
Abstract: Microwave assisted synthesis has received considerable attention as a powerful synthetic tool for metal complexes in many fields of inorganic chemistry, organic chemistry and material science. In this study, we focus on microwave-assisted synthesis of Schiff base ligand and their metal complexes. Schiff base ligand, was obtained from the condensation of Riluzole (6(trifluromethoxy) benzothiozole-2-amine) and 2-hydroxy acetophenone with high atom economy of 95% and metal complexes of the type MLn=1,2.(H2O)n=0,1,2 Cln=0,1, where M is the metal ion and L is the ligand Synthesized metal complexes were characterized by using elemental analysis, conductance, magnetic susceptibility measurements, mass, UV-Vis, IR, 1 HNMR and ESR. The Schiff base behaves as a bidentate ligand and it coordinates through the oxygen atom of the deprotonated phenolic group and the nitrogen of imine group. All these complexes were nonelectrolyte in nature. On the basis of the spectro-chemical data indicates that, the structure for all the coordination metal complexes of Mn(II), Co(II), Fe(III), Ni(II),Cr(III) and Cu(II) shows octahedral geometry, whereas Zn(II), Cd(II), and Hg(II) complexes gives tetrahedral geometry and ZrO(II) and VO(II) complexes indicate the square pyramidal geometry. All these complexes were screened for their antibacterial activity by agar cup-plate method against various organisms, and the results were compared.
8 citations
TL;DR: In this paper, a bis(ligand) complex of zinc(II) containing a Group 15 donor atom was identified by X-ray powder diffraction, which is known as ZnI2(AsMe3)2.
Abstract: The reaction of Et3AsI2 with zinc metal powder produced the dimeric complex [ZnI2(AsEt3)]2, whereas that of Me3AsI2 gave equimolar quantities of ZnI2(AsMe3)2 and ZnI2, the latter being identified by X-ray powder diffraction. Both arsine complexes have been structurally characterised and as such represent the only examples for zinc(II). A structural change is thus seen on changing the R groups on the R3AsI2 compound. The complex ZnI2(AsMe3)2 represents the sole example of a bis(ligand) complex of zinc(II) containing a Group 15 donor atom. Both complexes contain the zinc atoms in essentially tetrahedral geometry but significant distortion is noted for ZnI2(AsMe3)2, which may be the result of unfavourable steric interactions.
8 citations
TL;DR: The reactive Bi(V)N bond in (acylimino)triaryl-λ5-bismuthanes has been found to be stabilized effectively by ortho-substituted aryl ligands such as o-tolyl, o-anisyl, and mesityl groups as discussed by the authors.
8 citations
TL;DR: In this paper, the ability of [{CuCl}2(Me2NNC10H14O)] to promote the activation of 4-pentyn-1-ol towards cyclization was studied under homogeneous or heterogeneous experimental conditions.
8 citations
TL;DR: In this paper, high-resolution emission spectra of [Dtilde] 2A1]-Ctilde 2T2 transitions in CF+ 4 were obtained from a hollow cathode discharge in CF4/He mixtures.
Abstract: High-resolution emission spectra of [Dtilde] 2A1-[Ctilde] 2T2 transitions in CF+ 4 were obtained from a hollow cathode discharge in CF4/He mixtures. The partly resolved rotational structures of the 0-0, 10 1 and 10 2 bands were analysed on the basis of a model Hamiltonian developed by Watson for tetrahedral molecules. Spectroscopic constants were determined via computer simulations and relations for intervals between heads of branches. Spin-orbit coupling, Coriolis interaction and Jahn-Teller distortion in the lower electronic state were found to be relatively small but to show a vibrational dependence on v 1.
8 citations