Results 231 to 240 of about 66,931 (265)

Reactions of O-silyl selenocarboxylates; IR and NMR spectra of heteroatom-substituted selenocarboxylates

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, Kenji Kido, Shinzi Kato, Toshiaki Murai   +3 more
openaire   +1 more source

Structure, IR, and NMR spectra of tetrakis(4-methyl piperidinedithiocarbamate) dimercury(II)

Journal of Crystallographic and Spectroscopic Research, 1988
The 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, Antonio C. Fabretti, Carlo Preti   +2 more
openaire   +1 more source

Hydrogen bonding of N-methylacetamide in CDCl3 solution studied by NMR and IR spectra

Spectrochimica Acta Part A: Molecular Spectroscopy, 1994
Abstract The amide proton NMR chemical shifts have been widely used for the determination of the population fraction of the non-hydrogen-bonded states in studies of hydrogen bonding in peptides and proteins. However, in such works the determination of the limiting chemical shifts for the fully hydrogen-bonded state and for the non-hydrogen-bonded ...
Minoru Akiyama, Toshiaki Ohtani
openaire   +1 more source

Density functional theory study on lactides: Geometries, IR, NMR and electronic spectra

Journal of Molecular Structure: THEOCHEM, 2007
Abstract Density functional theory (DFT) has been used to determine the equilibrium geometries, IR, total energies and NMR chemical shifts of various kinds of lactides. According to the calculations, besides l -lactide and d -lactide, three kinds of meso-lactides have been obtained: meso-i-lactide, meso-α-lactide and meso-β-lactide.
Wenpeng Wu, Wenbin Li, Lianbin Wang, Puyu Zhang, Jinglai Zhang   +4 more
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Poly‐(+)‐2‐methylbutyl acrylate. Preparation, IR and NMR spectra, optical rotatory dispersion and ultraviolet spectra

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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Experimental and theoretical studies on compositions, structures, and IR and NMR spectra of functionalized protic ionic liquids

Physical Chemistry Chemical Physics, 2016
DMCEAP and DMEOAP are composed of neutral and ionized species in the liquid phase as investigated through experimental spectroscopy and DFT calculations.
Yingna, Cui, Jingmei, Yin, Changping, Li, Shenmin, Li, Ailing, Wang, Guang, Yang, Yingping, Jia   +6 more
openaire   +2 more sources

The effects of aryl substituents on ir, nmr, and mass spectra of N-t-butylbenzamides

Journal of Chemical Education, 1974
The authors have developed this experiment in order to give students the opportunity to carry out a high yield synthetic reaction coupled with an analysis of the effects of substituents on the IR, ...
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Characterization of NMR, IR, and Raman spectra for siloxanes and silsesquioxanes: a mini review

Journal of Sol-Gel Science and Technology, 2022
Yohei Sato, Ryohei Hayami, Takahiro Gunji   +2 more
openaire   +1 more source

Internal rotation of biphenyl in solution studied by IR and NMR spectra

The Journal of Physical Chemistry, 1986
M.Akiyama, T.Watanabe, M.Kakihana
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Association of thiopivalic acid in solutions, as investigated by IR spectra and NMR spectra at low temperatures

Journal of Applied Spectroscopy, 1983
N. S. Golubev, L. L. Kimtis, R. A. Shimkus   +2 more
openaire   +1 more source