A pyrolysis jet spectroscopic study of the rotationally resolved electronic spectrum of dichlorocarbene

1991 ◽  
Vol 94 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Dennis J. Clouthier ◽  
Jerzy Karolczak
Keyword(s):  
Spectroscopic Study ◽  
Electronic Spectrum

The chemistry of pyrrolic compounds. XLII. The synthesis of some diacetyldeuteroporphyrins as intermediates in the preparation of the isomeric protoporphyrins: a comparative spectroscopic study of the diacetyldeuteroporphyrins

1980 ◽  
Vol 33 (3) ◽  
pp. 545 ◽  
Author(s):  
PS Clezy ◽  
CJR Fookes
Keyword(s):  
Chemical Shift ◽  
Spectroscopic Study ◽  
Electronic Spectrum ◽  
Relative Position ◽  
Visible Spectrum ◽  
Oxidative Cyclization ◽  
Relative Distribution ◽  
Absorption Pattern ◽  
The One ◽  
Carbonyl Function

A range of isomeric diacetyldeuteroporphyrins has been synthesized by the oxidative cyclization of appropriately substituted bilenes-b, and the electronic and n.m.r. spectra of these porphyrins have been studied. As a result it has been shown that the relative position of the two acetyl groups influences the absorption pattern of the visible spectrum more precisely than was previously appreciated. In consequence, it is possible to recognize the 1,4, 2,3 and 2,4 relative distribution of the acetyl groups by an examination of the electronic spectrum. In addition, it is clear that the acetyl groups present in this series of porphyrins affect the chemical shift of all the methine protons and not only the one which is directly adjacent to the carbonyl function.

Some Results of the Spectroscopic Study of Four Close Binary Systems of Early Spectral Types

1965 ◽  
Vol 5 ◽  
pp. 120-130
Author(s):  
T. S. Galkina
Keyword(s):  
Spectroscopic Study ◽  
Spectral Type ◽  
Spectroscopic Investigation ◽  
Binary Systems ◽  
Quantitative Information ◽  
Close Binary ◽  
Physical Parameters ◽  
Absorption And Emission ◽  
Close Binary Systems ◽  
Quantitative Estimates

It is necessary to have quantitative estimates of the intensity of lines (both absorption and emission) to obtain the physical parameters of the atmosphere of components.Some years ago at the Crimean observatory we began the spectroscopic investigation of close binary systems of the early spectral type with components WR, Of, O, B to try and obtain more quantitative information from the study of the spectra of the components.

A spectroscopic study of soil fulvic acid composition after six-year applications of urban waste compost

Agronomie ◽  
2003 ◽  
Vol 23 (8) ◽  
pp. 719-724 ◽  
Author(s):  
Giovanni Gigliotti ◽  
Alceo Macchioni ◽  
Cristiano Zuccaccia ◽  
Pier Lodovico Giusquiani ◽  
Daniela Businelli
Keyword(s):  
Spectroscopic Study ◽  
Fulvic Acid ◽  
Acid Composition ◽  
Urban Waste

A Spectroscopic Study of the Environments of Gravitational Lens Galaxies

2006 ◽  
Vol 20 ◽  
pp. 289-290
Author(s):  
I. Momcheva ◽  
K. Williams ◽  
C. Keeton ◽  
A. Zabludoff
Keyword(s):  
Spectroscopic Study ◽  
Gravitational Lens ◽  
Lens Galaxies
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