THE INFRARED CARBONYL STRETCHING BANDS OF RING SUBSTITUTED ACETOPHENONES

1957 ◽  
Vol 35 (5) ◽  
pp. 504-514 ◽  
Author(s):  
R. Norman Jones ◽  
W. F. Forbes ◽  
W. A. Mueller
Keyword(s):  
Carbon Tetrachloride ◽  
Infrared Spectra ◽  
Aromatic Nucleus ◽  
Carbon Tetrachloride Solution ◽  
Substituent Group ◽  
Acetophenone Derivatives

An examination has been made of the carbonyl stretching bands in the infrared spectra of acetophenone derivatives substituted in the aromatic nucleus. The positions, integrated absorption intensities, and widths of the bands have been measured in carbon tetrachloride solution. The variation of these quantities is discussed in relation to the nature and position of the substituent group.

Vibrational Spectra of Several Lanthanide Tris-2,2,6,6-tetramethyl-3,5-heptanedionates

1972 ◽  
Vol 26 (2) ◽  
pp. 251-256 ◽  
Author(s):  
Hsien-Yu Lee ◽  
Forrest F. Cleveland ◽  
Joseph S. Ziomek ◽  
Frank Jarke
Keyword(s):  
Group Theory ◽  
Carbon Tetrachloride ◽  
Raman Spectra ◽  
Infrared Spectra ◽  
Vibrational Spectra ◽  
Far Infrared ◽  
Infrared Region ◽  
Carbon Tetrachloride Solution ◽  
Powder Samples ◽  
Disk Method

The Raman spectra of La-, Pr-, and Gd(DPM)3 [Gd-tris-2,2,6,6-tetramethyl-3,5-heptanedionate] were measured at 300°K with powder samples in the region 3000–100 cm−1. An attempt also was made to obtain the Raman spectra of La-, Ce-, Pr-, Nd-, and Gd(DPM)3 in carbon tetrachloride solution, but no Raman lines for these compounds were found. The undisplaced mercury lines observed were unusually strong. This may have been caused by the photodecomposition of M (DPM)3 in carbon tetrachloride solution by exposure to the light. The infrared spectra of La-, Ce-, Pr-, Nd-, and Gd(DPM)3 were obtained in the region 4000–300 cm−1 by the KBr disk method at 300°K. For La-, Nd-, and Gd(DPM)3, the absorption spectra were measured in the far-infrared region (660–76 cm−1) by use of the polyethylene disk method at 300 and 77 °K. Assignments of the vibrational frequencies were made on the bases of the group theory selection rules and group frequencies, and these were compared with the known assignments of tris-(acetylacetonato) lanthanide (III) complexes for most of the bands.

The Photo‐Chlorination of Methyl Chloroformate in Carbon Tetrachloride Solution

1949 ◽  
Vol 17 (6) ◽  
pp. 566-573 ◽  
Author(s):  
T. L. Batke ◽  
L. M. Dorfman ◽  
D. J. LeRoy
Keyword(s):  
Carbon Tetrachloride ◽  
Carbon Tetrachloride Solution

Infrared spectra of aqueous sodium benzoates and salicylates in the carboxyl-stretching region: chelation in aqueous sodium salicylates

1969 ◽  
Vol 47 (24) ◽  
pp. 4577-4588 ◽  
Author(s):  
G. E. Dunn ◽  
R. S. McDonald
Keyword(s):  
Salicylic Acid ◽  
Carbon Tetrachloride ◽  
Infrared Spectra ◽  
Aromatic Compounds ◽  
Deuterium Oxide ◽  
Substituent Effects ◽  
Good Evidence ◽  
Frequency Region ◽  
Aqueous Sodium ◽  
Substituent Constants

Infrared spectra in the frequency region 1300–1760 cm−1 are reported for 41 substituted sodium benzoates and 10 substituted sodium salicylates in deuterium oxide solution, and for 9 substituted salicylic acids in chloroform and carbon tetrachloride solutions. Carboxylate stretching frequencies of benzoates and salicylates correlate poorly with substituent constants, but the asymmetric frequencies of benzoates and salicylates correlate well with each other, and the asymmetric frequencies of benzoates correlate well with the asymmetric frequencies of the corresponding nitrobenzenes. It is suggested that, among substituted aromatic compounds, group vibrations which couple with the ring vibrations may correlate well with similar vibrations of other groups, but not with coupled vibrations of different symmetry, uncoupled vibrations, or substituent constants. Chelation in chloroform solutions of salicylic acid dimers can be detected by its influence on substituent effects, but infrared spectra provide no good evidence for chelation in aqueous sodium salicylates.

Synthesis of Silicon Carbide Films from Partially Oxidized Polyvinylsilane by Carbon Tetrachloride Solution Casting

2002 ◽  
Vol 17 (1) ◽  
pp. 214-223 ◽  
Author(s):  
Masaki Narisawa ◽  
Takeshi Hasegawa ◽  
Kiyohito Okamura ◽  
Masayoshi Itoh ◽  
Thomas Apple ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Carbon Tetrachloride ◽  
Radical Polymerization ◽  
Air Flow ◽  
Spectroscopic Studies ◽  
Flow Time ◽  
Silica Layer ◽  
Solution Casting ◽  
Amorphous Films ◽  
Carbon Tetrachloride Solution

Polyvinylsilane (PVS), derived from vinylsilane by radical polymerization, was partially oxidized in hot carbon tetrachloride solution by flowing air. If the air flow time is adjusted, soft gel films can be formed in a Teflon dish by casting the PVS solution. After the PVS films were peeled from the substrates, they were pyrolyzed at various temperatures. Spectroscopic studies of the pyrolyzed films up to 1273 K suggested that carbosilane (Si–CH2–Si) structures are formed in the films at 473–673 K. The compositions of the amorphous films obtained at 1673 K were approximately SiC1.38O0.21 and SiC1.41O0.51, depending on the crosslinking conditions. The oxygen incorporated in the films was removed in the form of CO and SiO during further heating at 1673–1873 K. The compositions of the films were changed to approximately SiC1.25 and SiC1.26, respectively, at 2073 K. The films obtained at 1273 K did not show degradation during the oxidation at 1273–1673 K while a protective silica layer was formed on their surfaces.

scholarly journals THE USE OF INFRARED SPECTROPHOTOMETRY FOR THE ESTIMATION OF SMALL QUANTITIES OF SOME HALOGENATED HYDROCARBONS

1953 ◽  
Vol 31 (4) ◽  
pp. 328-337 ◽  
Author(s):  
L. Breitman ◽  
E. W. R. Steacie
Keyword(s):  
Quantitative Analysis ◽  
Carbon Tetrachloride ◽  
Gas Phase ◽  
Infrared Spectra ◽  
Methyl Chloride ◽  
Ternary Mixtures ◽  
Halogenated Hydrocarbons ◽  
Infrared Spectrophotometry ◽  
Absorption Bands ◽  
Binary And Ternary Mixtures

The infrared spectra of chloral, carbon tetrachloride, and chloroform have been determined between 1500 and 650 cm.−1 over a range of pressures in the gas phase. Absorption bands suitable for the quantitative analysis of binary and ternary mixtures of the components have been selected and their peak intensities shown to obey Beer's Law over the range of pressures studied. Ternary mixtures have been analyzed from the spectra with an accuracy of about 20%.The spectra of dichloromethane and methyl chloride have also been measured under comparable conditions.

Sign in / Sign up

Export Citation Format

Share Document