INFRARED SPECTRA AND THE STRUCTURES OF XANTHATES AND DIXANTHOGENS

1961 ◽  
Vol 39 (8) ◽  
pp. 1633-1637 ◽  
Author(s):  
M. L. Shankaranarayana ◽  
C. C. Patel
Keyword(s):  
Metal Complexes ◽  
Infrared Spectra ◽  
Strong Absorption ◽  
Canonical Structure ◽  
Absorption Bands ◽  
Ionic Compounds ◽  
Structure Formula ◽  
Xanthic Acid

The infrared spectra of representative dialkyl dixanthogens and a few xanthates have been examined. All these compounds have two strong absorption bands in the regions 1140–1265 and 1010–1080 cm−1. On the basis of the shift of the bands with the changes in the substituents in the xanthic acid, the former band is assigned to the C=S group, while the latter to the CO group. Except in the ionic compounds, the canonical structure [Formula: see text] contributes very little to the structures of dixanthogens and covalent metal complexes.

Angular Dependence of Diffuse Reflectance Infrared Spectra. Part III: Linearity of Kubelka-Munk Plots

1988 ◽  
Vol 42 (2) ◽  
pp. 242-247 ◽  
Author(s):  
Paul J. Brimmer ◽  
Peter R. Griffiths
Keyword(s):  
Angular Dependence ◽  
Infrared Spectra ◽  
Diffuse Reflectance ◽  
Strong Absorption ◽  
Absorption Bands ◽  
Linear Region ◽  
Line Configuration ◽  
Munk Function ◽  
Before And After ◽  
Diffuse Reflectance Infrared

The linearity of plots of the Kubelka-Munk function against concentration is investigated for weak and strong absorption bands in the spectrum of a typical organic analyte, caffeine. The linear region is extended when measurements are made with an off-axis optical geometry, in comparison to an in-line configuration. For the latter configuration, the linearity is improved when crossed polarizers are placed before and after the sample.

Infrared spectra of compounds with the methoxymethyl protecting group

1986 ◽  
Vol 51 (1) ◽  
pp. 90-100 ◽  
Author(s):  
Soňa Vašíčková ◽  
Vladimír Pouzar ◽  
Ivan Černý ◽  
Pavel Drašar ◽  
Miroslav Havel
Keyword(s):  
Infrared Spectra ◽  
Strong Absorption ◽  
Protecting Group ◽  
Absorption Bands ◽  
Stretching Vibrations

Infrared spectra of a series of compounds containing the CH3OCH2O- (MOM-O-) group have been studied. All the spectra exhibit three characteristic strong absorption bands due to coupled stretching vibrations of C-O-C-O-C grouping in the region 1 200 - 1 000 cm-1.

Studies on metal hydroxy compounds. IV. Infrared spectra of cadmium derivatives Cd(OH)2, CdOHCl, and CdOHF

1967 ◽  
Vol 45 (24) ◽  
pp. 3199-3201 ◽  
Author(s):  
O. K. Srivastava ◽  
E. A. Secco
Keyword(s):  
Infrared Spectra ◽  
Strong Absorption ◽  
Lattice Vibrations ◽  
Absorption Bands ◽  
Simple Molecule ◽  
Stretching Vibration ◽  
Hydroxy Compounds ◽  
First Time ◽  
Lower Frequencies

Infrared spectra of hexagonal Cd(OH)2, CdOHCl, and CdOHF, along with deuterated analogues CdODCl and CdODF, in the range 2.5–16 μ are reported for the first time. The effects of substituting a halogen for an OH group in Cd(OH)2 are (i) shift of OH stretching vibration to a lower frequency and (ii) appearance of strong absorption bands in the region 8–16 μ. All the observed bands in the deuterated analogues are displaced to lower frequencies with νH/νd ratios between 1.35–1.37. The spectra of CdOHCl and CdOHF show a high correlation with their zinc analogues and although both spectra appear consistent with a simple molecule of Cs or C1 symmetry, an alternate interpretation is given in terms of OH lattice vibrations.

Spectra-structure correlations from the infrared spectra of some transition metal complexes of 8-hydroxyquinoline

1989 ◽  
Vol 213 ◽  
pp. 133-144 ◽  
Author(s):  
Carola Engelter ◽  
Graham E. Jackson ◽  
Cheryl L. Knight ◽  
David A. Thornton
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Infrared Spectra ◽  
Structure Correlations

ChemInform Abstract: INFRARED SPECTRA OF METAL COMPLEXES OF OCTAETHYLCHLORINE ANALOGS OF CHLOROPHYLL AND HEME D

1975 ◽  
Vol 6 (33) ◽  
pp. no-no
Author(s):  
H. OGOSHI ◽  
E. WATANABE ◽  
Z. YOSHIDA ◽  
J. KINCAID ◽  
K. NAKAMOTO
Keyword(s):  
Metal Complexes ◽  
Infrared Spectra

ChemInform Abstract: INFRARED SPECTRA OF SOME BIVALENT METAL COMPLEXES OF MANDELIC ACID

1974 ◽  
Vol 5 (8) ◽  
Author(s):  
P. V. KHADIKAR ◽  
R. L. AMERIA ◽  
M. G. KEKRE ◽  
S. D. CHAUHAN
Keyword(s):  
Metal Complexes ◽  
Infrared Spectra ◽  
Mandelic Acid ◽  
Bivalent Metal ◽  
Bivalent Metal Complexes

Pyrrole Studies. I. The Infrared Spectra of 2-Monosubstituted Pyrroles

1963 ◽  
Vol 16 (1) ◽  
pp. 93 ◽  
Author(s):  
RA Jones
Keyword(s):  
Infrared Spectra ◽  
Infrared Absorption ◽  
Absorption Bands ◽  
Infrared Absorption Bands

The positions and intensities of the characteristic infrared absorption bands of the nucleus are recorded and discussed for thirty-five 2-monosubstituted pyrroles.

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.

Gaseous infrared spectra of the simplest geminal diol CH2(OH)2 and the isotopic analogues in the hydration of formaldehyde

2021 ◽  
Author(s):  
Hung-Yang Jain ◽  
Chih-Tsun Yang ◽  
Li-Kang Chu
Keyword(s):  
Infrared Spectrum ◽  
Infrared Spectra ◽  
Absorption Bands ◽  
Geminal Diol

The infrared spectrum of the simplest geminal diol, methanediol or methylene glycol (CH2(OH)2), was successfully probed in the gaseous hydration of formaldehyde. The observed absorption bands coincided with the anharmonic...

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