α-OBSCURINE AND β-OBSCURINE: STRUCTURE STUDIES

1953 ◽  
Vol 31 (10) ◽  
pp. 952-957 ◽  
Author(s):  
Barry P. Moore ◽  
Léo Marion
Keyword(s):  
Absorption Spectrum ◽  
Double Bond ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
The Other ◽  
Ultraviolet Absorption Spectrum ◽  
Amino Group ◽  
Absorption Bands ◽  
Secondary Amino ◽  
Cyclic Lactam

The alkaloid hitherto described as obscurine has been shown to consist of a mixture of two bases, α-obscurine (C17H26ON2) and β-obscurine (C17H24ON2). Dehydregenation of α-obscurine by heating with palladium-charcoal gives rise to 7-methylquinoline and 6-methyl-α-pyridone. The infrared absorption spectrum of the base shows absorption bands indicative of a carbony and of a secondary amino group, possibly in a cyclic lactam, while absorption in the ultraviolet indicates the presence of a double bond conjugated with the carbonyl group. β-Obscurine on the other hand contains an α-pyridone ring as shown by its infrared absorption spectrum and also by the similarity of its ultraviolet absorption spectrum with that of 6-methyl-α-pyridone.

OPTICAL SPECTROSCOPY AND NONLINEAR TRANSMITTANCE STUDY OF FULLERENE C60 IN MIXTURES WITH 2-CYCLOOCTYLAMINO-5-NITROPYRIDINE (COANP)

2004 ◽  
Vol 13 (01) ◽  
pp. 113-127 ◽  
Author(s):  
SERGEY S. SARKISOV ◽  
ELENA I. RADOVANOVA ◽  
BURL H. PETERSON ◽  
ALEX LEYDERMAN ◽  
MICHAEL CURLEY ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectrum ◽  
Optical Absorption ◽  
Infrared Absorption ◽  
Chemical Bonding ◽  
Infrared Absorption Spectrum ◽  
Visible Region ◽  
Fullerene C60 ◽  
Amino Group

Characterization of the infrared absorption spectrum of the solutions of fullerene C 60 with 2-cyclooctylamino-5-nitropyridine additive has been performed with the focus on possible bonding with the amino-group of the additive. No occurrence of such bonding was found at normal conditions. Also no change of optical absorption in visible region and optical limiting of fullerene due to chemical bonding with the additive was detected. The resulting optical properties of the mixture were simply a sum of the properties of the components for a molar proportion of the additive to fullerene approaching 200:1.

Infrared absorption spectrum of vanadyl pentaammoniate

1971 ◽  
Vol 15 (4) ◽  
pp. 1349-1351
Author(s):  
L. V. Kobets ◽  
N. I. Vorob'ev ◽  
V. V. Pechkovskii ◽  
A. I. Komyak
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum

The infrared absorption spectrum of 18O-labelled nitrobenzene

1964 ◽  
Vol 20 (2) ◽  
pp. 179-185 ◽  
Author(s):  
S. Pinchas ◽  
D. Samuel ◽  
B.L. Silver
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum

Far-infrared absorption spectrum of the CH4-H2 gaseous mixture

1986 ◽  
Vol 36 (3) ◽  
pp. 239-247 ◽  
Author(s):  
P. Codastefano ◽  
P. Dore ◽  
L. Nencini
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Gaseous Mixture ◽  
Far Infrared

Infrared Absorption Spectrum of Gamma-Benzene Hexachloride

1949 ◽  
Vol 21 (5) ◽  
pp. 630-630 ◽  
Author(s):  
H. L. Cupples
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Benzene Hexachloride

scholarly journals The infrared absorption spectrum of formaldehyde vapor

1957 ◽  
Vol 1 (1-4) ◽  
pp. 124-132 ◽  
Author(s):  
Henry H. Blau ◽  
Harald H. Nielsen
Keyword(s):  
Absorption Spectrum ◽  
Infrared Absorption ◽  
Infrared Absorption Spectrum ◽  
Formaldehyde Vapor
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