scholarly journals Effects of Substituents on the Electronic Spectra of Organic Compounds. II. Electronic Structure and Electronic Spectra of Nitro Group and its Related Substances.

1957 ◽  
Vol 78 (11) ◽  
pp. 1643-1646 ◽  
Author(s):  
Jiro Tanaka
Keyword(s):  
Electronic Structure ◽  
Nitro Group ◽  
Organic Compounds ◽  
Electronic Spectra ◽  
Related Substances

scholarly journals Chemical Bonding and the Sulfur K X-Ray Spectrum

1965 ◽  
Vol 9 ◽  
pp. 354-364 ◽  
Author(s):  
D. W. Wilbur ◽  
J. W. Gofman
Keyword(s):  
Electronic Structure ◽  
Single Crystal ◽  
Organic Compounds ◽  
Sulfur Atom ◽  
Chemical Bonding ◽  
Proportional Counter ◽  
Pulse Height ◽  
X Ray ◽  
Pulse Height Analysis ◽  
Chemical States

AbstractAn investigation has been made of the relative Kβ intensities in different chemical states of the sulfur atom using the Kα lines, with appropriate corrections, to provide the intensity standards. Both inorganic and organic compounds were included in the study. The data for each compound appear to be reliable to about ± 0.5%, while the whole series of compounds shows a variation greater than 20% in the corrected Kβ/Kα ratios. Energies were also measured, particularly the Kα energies, and their shifts were studied relative to the Kβ, intensity shifts. The work was done with a plane, single-crystal, helium-path spectrometer with proportional counter and pulse-height analysis for detection. The results are indicative of the usefulness of the method both in clarifying an uncertain chemical state and in studying the electronic structure of the bonded atom.

Hydrogen Bonding in organic compounds. 1. o-Nitroanilines

1958 ◽  
Vol 11 (4) ◽  
pp. 513 ◽  
Author(s):  
LK Dyall ◽  
AN Hambly
Keyword(s):  
Hydrogen Bonding ◽  
Nitro Group ◽  
Organic Compounds ◽  
Intramolecular Hydrogen Bonding ◽  
Amino Group ◽  
Infra Red ◽  
Sterically Hindered ◽  
Intramolecular Hydrogen

The infra-red spectra of o-nitroanilines do not indicate any intramolecular hydrogen bonding unless there are nitro groups in both positions 2 and 6 to the amino group. An examination of the literature shows that there is no unambiguous evidence from other sources of such bonding in simple o-nitroanilines. An explanation is given of the variation of the stretching frequencies of the nitro group in sterically hindered compounds and in those with electron-donating ortho- and para-substituents.

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