Results 261 to 270 of about 186,089 (306)
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Die Makromolekulare Chemie, 1971
AbstractIR, NMR, ORD, and UV measurements were carried out on the poly‐(+)‐2‐methylbutyl acrylates obtained by the radical (R‐PMBA) and anionic (A‐PMBA) polymerization processes and on the (+)‐2‐methylbutyl isobutyrate (model compound).There are not any differences in IR and NMR spectra of R‐ and A‐PMBA.
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AbstractIR, NMR, ORD, and UV measurements were carried out on the poly‐(+)‐2‐methylbutyl acrylates obtained by the radical (R‐PMBA) and anionic (A‐PMBA) polymerization processes and on the (+)‐2‐methylbutyl isobutyrate (model compound).There are not any differences in IR and NMR spectra of R‐ and A‐PMBA.
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Structure, IR, and NMR spectra of tetrakis(4-methyl piperidinedithiocarbamate) dimercury(II)
Journal of Crystallographic and Spectroscopic Research, 1988The compound C14H24HgN2S4 was prepared and characterized by means of X-ray, IR, and NMR measurements. The crystals are monoclinic, space group P21/c, (No. 14) witha=8.697(2),b=19.156(3),c=12.098(2) A,β=108.14(1)° andZ=4. The structure was solved by the heavy-atom method, and least-squares refinement of structural parameters led to a conventionalR ...
Adriano Benedetti +2 more
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IR and/or NMR Spectra-Structure Correlations for Organonitrogen-Containing Compounds
Applied Spectroscopy, 1988IR and/or NMR spectra-structure correlations have been developed which aid in the elucidation of molecular structure of organonitrogen-containing compounds.
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Phonon, IR, and Raman Spectra, NMR Parameters, and Elastic Constant Calculations for AlH3 Polymorphs
The Journal of Physical Chemistry A, 2011The electronic structure, lattice dynamics, and mechanical properties of AlH(3) phases have been studied by density functional calculations. The chemical bonding in different polymorphs of AlH(3) are evaluated on the basis of electronic structures, charge density analysis, and atomic charges, as well as bond overlap population analysis and the Born ...
P, Vajeeston, P, Ravindran, H, Fjellvåg
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Spectroscopic characterization of extracts from humic and fulvic fractions: IR and1H NMR spectra
Plant and Soil, 1983Infrared and proton resonance spectra have been used to characterize fraction extracted sequentially from humic and fulvic acids by diethylether, acetone, dioxane, tetrahydrofuran, pyridine and dimethylformamide. The results showed that the same solvents extracted structurally similar components from both humic and fulvic acids.
C. Gessa +4 more
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NMR and IR spectra-structure correlations for carbonyl containing compounds in various solvents
Journal of Molecular Structure, 1996Abstract The δ 13 CO chemical shifts and the carbonyl stretching frequencies ν CO are affected by their physical surroundings, and information about the chemical structure can be obtained by study of δ 13 CO and ν CO in various solvents or solvent systems.
R.A. Nyquist, R. Streck, G. Jeschek
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Journal of the Chemical Society, Perkin Transactions 1, 1994
O-Silyl selenocarboxylates 1 react readily with acyl chlorides to give selenoanhydrides. Attempts to synthesize unsymmetrical selenoanhydrides selectively gave mixtures of the desired products with symmetrical selenoanhydrides. Ph3GeCl, Ph3SnCl, Ph3PbCl, Ph2PCl and Ph2AsCl were treated with 1 to give the corresponding selenocarboxylates containing a Se–
Hideki Kageyama +3 more
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O-Silyl selenocarboxylates 1 react readily with acyl chlorides to give selenoanhydrides. Attempts to synthesize unsymmetrical selenoanhydrides selectively gave mixtures of the desired products with symmetrical selenoanhydrides. Ph3GeCl, Ph3SnCl, Ph3PbCl, Ph2PCl and Ph2AsCl were treated with 1 to give the corresponding selenocarboxylates containing a Se–
Hideki Kageyama +3 more
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Experimental and theoretical IR, Raman, NMR spectra of 2-, 3- and 4-aminobenzoic acids
Journal of Molecular Structure, 2005The influence of amino group position towards the carboxylic group on the vibration structure of the molecule was estimated. The calculated parameters were compared to experimental characteristic of these molecules. FT-IR, FT-Raman and NMR spectra of the title compounds were recorded and analyzed.
M. Samsonowicz +4 more
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Experimental and theoretical IR, Raman, NMR spectra of 2‐, 3‐, and 4‐nitrobenzoic acids
International Journal of Quantum Chemistry, 2006AbstractThe influence of the position of nitro group toward the carboxylic group on the vibration structure of the molecule was estimated. Optimized geometrical structures were calculated (HF, B3PW91, B3LYP). Experimental and theoretical FT‐IR, FT‐Raman, and nuclear magnetic resonance (NMR) spectra of the title compounds were recorded and analyzed. The
M. Samsonowicz +3 more
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NMR, IR and Raman spectra study of the structure of borate and borosilicate glasses
Journal of Non-Crystalline Solids, 1989Abstract Comparative studies on the IR and NMR of some binary borate systems and ternary borosilicate systems were made. The results of NMR in R 2 OB 2 O 3 , La 2 O 3 B 2 O 3 and Na 2 OB 2 O 3 SiO 2 glass systems were measured and calculated using the phase diagram model.
Tang Yongxing +2 more
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