The Raman Spectra and Conformational Change of Simple Sodium Alkylsulfates and Sodium Alkyisulfonates in Aqueous Solution

1983 ◽  
Vol 38 (9) ◽  
pp. 1046-1047 ◽  
Author(s):  
Teruki Ikeda ◽  
Tadayoshi Yoshida ◽  
Hirofumi Okabayashi
Keyword(s):  
Aqueous Solution ◽  
Concentration Dependence ◽  
Raman Spectra ◽  
Raman Line ◽  
Polar Group ◽  
Group Effect ◽  
Trans Form ◽  
Molecular Conformations ◽  
Sodium Alkylsulfates ◽  
Single Bonds

Abstract In order to study the polar group effect upon conformations about CH2-CH2 single bonds, the Raman spectra of simple sodium alkylsulfates and sodium alkyisulfonates were measured. The ethylsulfate ion (CH3-CH2-O-SO3-) in aqueous solution was found to take the trans form about the CH2 - O bond in 0.67-5.41 mol/1. For the n-propylsulfonate ion the Raman line due to the gauche form about the CH2 -CH2 bond was also observed, the trans form becoming predominant at higher concentrations. For the sulfate and sulfonate ions having butyl and hexyl chains, the concentration dependence of their molecular conformations was also investigated.

ChemInform Abstract: THE RAMAN SPECTRA AND MOLECULAR CONFORMATIONS OF SURFACTANTS IN AQUEOUS SOLUTION AND CRYSTALLINE STATES

1974 ◽  
Vol 5 (30) ◽  
Author(s):  
HIROFUMI OKABAYASHI ◽  
MASATAKA OKUYAMA ◽  
TEIZO KITAGAWA ◽  
TATSUO MIYAZAWA
Keyword(s):  
Aqueous Solution ◽  
Raman Spectra ◽  
Molecular Conformations

scholarly journals The Raman Spectra and Molecular Conformations of Surfactants in Aqueous Solution and Crystalline States

1974 ◽  
Vol 47 (5) ◽  
pp. 1075-1077 ◽  
Author(s):  
Hirofumi Okabayashi ◽  
Masataka Okuyama ◽  
Teizo Kitagawa ◽  
Tatsuo Miyazawa
Keyword(s):  
Aqueous Solution ◽  
Raman Spectra ◽  
Molecular Conformations

Raman spectra of rnercury(II) nitrate in aqueous solution and as the crystalline hydrate

1969 ◽  
Vol 22 (2) ◽  
pp. 337 ◽  
Author(s):  
RPJ Cooney ◽  
JR Hall
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bonding ◽  
Aqueous Solutions ◽  
Crystal Lattice ◽  
Raman Spectra ◽  
Raman Line ◽  
Covalent Bond ◽  
Crystalline Hydrate ◽  
Concentrated Aqueous Solutions ◽  
Mercury Nitrate

Raman spectra of mercury(II) nitrate in concentrated aqueous solutions (0.7-7.0M) indicate that the nitrate groups are present as associated ions or covalently bound groups. A gradual alteration in the appearance of the nitrate spectrum with increasing concentration is explained in terms of changes in the nature of mercury-nitrate interaction. A Raman line assignable to the stretching of a mercury-nitrate covalent bond has been observed at c. 270 cm-1. The spectrum of solid Hg(NO3)2,H2O differs from spectra of the aqueous solutions, mainly in the region 1300-1450 cm-1. Additional features are attributed to the influence of hydrogen bonding in the crystal lattice or to correlation field effects (anion-anion coupling).

scholarly journals Quantitative and Qualitative Analysis of Some Inorganic Compounds by Raman Spectroscopy

1994 ◽  
Vol 48 (7) ◽  
pp. 875-883 ◽  
Author(s):  
Daniel R. Lombardi ◽  
Chao Wang ◽  
Bin Sun ◽  
Augustus W. Fountain ◽  
Thomas J. Vickers ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Qualitative Analysis ◽  
Raman Spectra ◽  
Solid Phase ◽  
Inorganic Compounds ◽  
Core Material ◽  
Storage Tanks ◽  
Hanford Site ◽  
Sampling Probe

Raman spectra have been measured for a number of nitrates, nitrites, sulfates, ferrocyanides, and ferricyanides, both in the solid phase and in aqueous solution. Accurate locations of peak maxima are given. Limits of detection for some of the compounds are given for solutions and for solid mixtures in NaNO3. Preliminary measurements have been made on core material recovered from the storage tanks on the Hanford site in Richland, Washington. Representative spectra are presented, showing that it is possible to observe responses of individual components from measurements made directly on untreated cores, with the use of a fiberoptic sampling probe.

CONFORMATIONAL EQUILIBRIA IN OPEN-CHAIN α,β-UNSATURATED KETONES

1961 ◽  
Vol 39 (11) ◽  
pp. 2225-2235 ◽  
Author(s):  
K. Noack ◽  
R. Norman Jones
Keyword(s):  
Raman Spectra ◽  
Equilibrium Mixture ◽  
Infrared And Raman Spectra ◽  
Temperature Dependent ◽  
Trans Form ◽  
Open Chain ◽  
Unsaturated Ketones ◽  
Conformational Isomers ◽  
Alkyl Substitution ◽  
Conformational Equilibria

The infrared and Raman spectra of trans-Δ3-penten-2-one have been measured over the temperature range +30° to −75° and +85° to +5° respectively. The temperature-dependent changes observed in the spectra indicate that this ketone exists as an equilibrium mixture of s-cis and s-trans conformational isomers in the liquid state. The s-trans form is the more stable and is present exclusively in the crystalline solid.Similar measurements have been carried out on Δ3-buten-2-one. The infrared and Raman spectra of this ketone also exhibit temperature effects that can be explained by a similar equilibrium, though the evidence is not as conclusive as for trans-Δ3-penten-2-one.The influence of alkyl substitution at the α- and β-carbon atoms on the relative stability of the s-cis and s-trans forms of α,β-unsaturated ketones is discussed.

Raman spectra of n-butanoate ion (d0, 2-d2, 3-d2 and 4-d3) in aqueous solution. Assignment to the conformers

1995 ◽  
Vol 26 (2) ◽  
pp. 113-129
Author(s):  
N. Raada ◽  
R. Gaufrès ◽  
J.-L. Bribes ◽  
J. Maillols ◽  
C. Montginoul
Keyword(s):  
Aqueous Solution ◽  
Raman Spectra

The Change in the Raman Spectra of Chloroprene and Isoprene in the Polymerization Process

1943 ◽  
Vol 16 (4) ◽  
pp. 841-847
Author(s):  
A. Gantmacher ◽  
S. Medvedev
Keyword(s):  
Raman Spectrum ◽  
Double Bond ◽  
Raman Spectra ◽  
Polymer Molecule ◽  
Polymerization Process ◽  
High Polymer ◽  
Single Bond ◽  
Double Bonds ◽  
Continuous Background ◽  
Single Bonds

Abstract 1. When chloroprene and isoprene polymerize, besides the frequency characterizing the conjugate double bond in the monomer, there appears a higher frequency corresponding to the isolated double bond in the polymer. In the polymerization process, the intensity of the frequency of the conjugate double bond decreases and the intensity of the frequency of the isolated double bond increases. Because of the increase in the number of single bonds in the polymer, the intensity of the frequency of the single bond 1005 in the polymer is considerably greater than in the monomer. 2. Even in the case of the samples with high polymer contents (greater than 50 per cent), the intensity of the frequency of the conjugate double bond is considerably greater than the intensity of the frequency of the isolated double bond. This is attributable to the fact that part of double bonds disappear during polymerization. 3. The Raman spectra of the chloroprene and isoprene polymers differ essentially from those of the monomers. To characterize the frequencies of vibration in the polymer molecule, it is essential to investigate its Raman spectrum in a medium free of the monomer. 4. The formation of highly polymeric molecules on polymerization does not result in an increase in the intensity of the continuous background in spectrograms.

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