scholarly journals The absorption spectra of oestrone and related compounds in alkaline solution

1936 ◽  
Vol 30 (5) ◽  
pp. 906-908 ◽  
Author(s):  
Robert Kenneth Callow
Keyword(s):  
Absorption Spectra ◽  
Alkaline Solution ◽  
Related Compounds

The Absorption Spectra of Protoheme and Heme a Complexes with Amino Acids and Related Compounds

1965 ◽  
Vol 58 (4) ◽  
pp. 334-347 ◽  
Author(s):  
MIHOKO YOSHIDA ◽  
TADATOSHI KINOSHITA ◽  
SHIGEO HORIE ◽  
NORIO SHIMAZONO
Keyword(s):  
Amino Acids ◽  
Absorption Spectra ◽  
Related Compounds

ChemInform Abstract: PHOTOELECTRON AND ELECTRONIC ABSORPTION SPECTRA OF TETRATHIAFULVALENE AND RELATED COMPOUNDS

1976 ◽  
Vol 7 (12) ◽  
pp. no-no
Author(s):  
ROLF GLEITER ◽  
MICHIO KOBAYASHI ◽  
JENS SPANGET-LARSEN ◽  
JOHN P. FERRARIS ◽  
AARON N. BLOCH ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Related Compounds

The aggregation and reaction with oxygen of the tetrasodium salt of cobalt phthalocyanine-4,4',4'',4'''-tetrasulphonic acid

1973 ◽  
Vol 26 (2) ◽  
pp. 319 ◽  
Author(s):  
LC Gruen ◽  
RJ Blagrove
Keyword(s):  
Aqueous Solution ◽  
Ionic Strength ◽  
Molecular Oxygen ◽  
Absorption Spectra ◽  
Alkaline Solution ◽  
Cobalt Phthalocyanine ◽  
Visible Absorption ◽  
Reversible Addition ◽  
Dimeric Form ◽  
Low Ionic Strength

The reversible addition of molecular oxygen to the tetrasodium salt of cobalt phthalocyanine-4,4?,4?,4??-tetrasulphonic acid in aqueous solution has been confirmed. Visible absorption spectra of the monomeric and dimeric species and of the oxygen adduct have been determined. A monomer-dimer system prevails at neutral pH, low ionic strength, and low dye concentrations. The oxygen adduct and the dimeric form of the dye predominate in alkaline solution.

SYNTHESES AND ABSORPTION SPECTRA OF 2-SUBSTITUTED-3-HYDROXY-5-PYRAZOLONES: 4-n-HEXYL-5-PYRAZOLONES-4-C14

1954 ◽  
Vol 32 (9) ◽  
pp. 823-838 ◽  
Author(s):  
Paul E. Gagnon ◽  
Jean L. Boivin ◽  
Roderick MacDonald ◽  
Leo Yaffe
Keyword(s):  
Absorption Spectra ◽  
Infrared Spectra ◽  
Alkaline Solution ◽  
Diethyl Malonate ◽  
Ultraviolet Absorption ◽  
Methyl Ethyl ◽  
Specific Activities

2-Monosubstituted-3-hydroxy-5-pyrazolones were prepared from diethyl malonate itself and diethyl malonates monosubstituted with methyl, ethyl, propyl, butyl, amyl, hexyl, heptyl, and benzyl groups by condensation of the esters with o-, m-, and p-chlorophenylhydrazines, and n-hexylhydrazine. By using diethyl n-hexyl malonate-2-C14 and o-, m-, and p-chlorophenylhydrazines, and n-hexylhydrazine as starting materials the corresponding pyrazolones labelled with C14 were obtained. Their specific activities were 7.0, 8.8, 9.0, and 8.8 µc./gm. respectively. Ultraviolet absorption spectra were determined in neutral and alkaline solution and the infrared spectra were also obtained. From the data it was possible to ascribe the tautomeric structures best suited for the compounds.

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