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نمایش تعداد 1-10 از 26
Trimerization of sulfur trioxide: a density functional theory study
Upon condensation of the pure planar gas SO3 (D3h) trimerizes spontaneously, which is often called γ-SO3. It adopts a cyclic structure (C3V) described as [S(=O)2(μ–O)]3. The highly electrophilic nature of γ-SO3 results in ...
Conformational analysis, structure and vibrational assignment of hexafluoroacetone. A density functional theory study
Hexafluoroacetone, HFA, has been used as a stabilizer for peptide structures, as protecting and activating reagent, and as a structure modifier in proteins.
The vibrational spectra of HFA have been the subject of several studies [1-5]. Berney...
Structural, potential surface and vibrational spectroscopy studies of hypophosphorous acid in the gas and liquid phases. A theoretical study
The potential energy surfaces (PES), molecular and vibrational structure of hypophosphours acid (HPA)
were investigated by HF, MP2 and DFT-B3LYP level of theory using 6-31G** basis set. In order to approach solid ...
Vibrational Assignment of Trifluorobenzoylacetone
Molecular structure and vibrational frequencies of 4,4,4-trifluoro-1-phenyl-1,3-butanedione, known as trifluorobenzoylacetone (TFBA), have
been investigated by means of density functional theory (DFT) calculations. The ...
Molecular Structure and Vibrational Spectra Simulation of Macro-porous Lithium Metal Oxide Materials
Lithium cobalt oxide (LiCoO2) and Lithium nickel oxide (LiNiO2) as the lithium metal layered oxides have been drawing much attention as cathode materials for advanced rechargeable thin film lithium batteries. These lithium ...
Metal-Ligand Bond Vibrations In Alkaline Earth Metal Acetylacetonates
at the B3LYP/LANL2DZ level to optimize the structures and obtain the vibrational spectra of these compounds. These
calculations were also repeated for Be, Mg, and Ca acetylacetonates at the B3LYP and BLYP levels using 6-311++G**, 6-
311G...
Vibrational assignment of α-cyanoacetylacetone
The infrared and Raman spectra of α-cyanoacetylacetone have been analyzed by the aid of ab initio calculations at post-Hartree–Fock (MP2) and density functional theory (DFT) levels and by considering the spectral behavior ...
Conformational analysis, tautomerization, IR, Raman, and NMR studies of benzyl acetoacetate
A complete conformational analysis of the keto and enol forms of benzyl acetoacetate (BAA), a b-dicarbonyl compound, was carried out by ab initio calculations, at the density functional theory (DFT) level.By inspection of ...
Hydrogen bond strength and vibrational assignment of the enol form of 3-(ortho-methoxyphenylthio) and 3-(para-methoxyphenylthio) pentane-2,4-dione
The molecular structure of 3-(ortho-methoxyphenylthio) pentane-2,4-dione (o-MPTPD) and 3-(paramethoxyphenylthio)pentane-2,4-dione (p-MPTPD) has been investigated by means of Density
Functional Theory (DFT) calculations. ...
Tautomerism, conformational analysis, and spectroscopy studies of 3-bromo-pentane-2,4-dione
Molecular structures of the stable conformers of cis-enol and keto forms of 3-bromo-pentane-2,4-dione (α-bromo-acetylacetone, BrAA) have been investigated by means of Density Functional Theory (DFT) calculations and the ...