scholarly journals Polar Conjugative Effect of Aryldithia Group on the Dissociation and Ultraviolet Spectra of Substituted Phenols

1968 ◽  
Vol 41 (9) ◽  
pp. 2082-2086 ◽  
Author(s):  
Shigeru Oae ◽  
Masakuni Yoshihara
Keyword(s):  
Substituted Phenols ◽  
Ultraviolet Spectra

Infrared and ultraviolet spectra of 3-fluorobenzoylchloride

1976 ◽  
Vol 73 ◽  
pp. 902-904
Author(s):  
G. N. R. Tripathi ◽  
V. M. Pandey
Keyword(s):  
Ultraviolet Spectra

Separation of close boiling substituted phenols by dissociation extraction

1981 ◽  
Vol 31 (1) ◽  
pp. 279-284 ◽  
Author(s):  
Vishwas V. Wadekar ◽  
Man Mohan Sharma
Keyword(s):  
Substituted Phenols

Quantitative Structure-Property Relationship (QSPR) Study of the Hydrophobicity of Phenols and 2-(Aryloxy-a-acetyl)-phenoxathiin Derivatives

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Adrian Beteringhe ◽  
Ana Cristina Radutiu ◽  
Titus Constantinescu ◽  
Luminita Patron ◽  
Alexandru T. Balaban
Keyword(s):  
Water Solubility ◽  
Molecular Descriptors ◽  
Log P ◽  
Structure Property ◽  
Substituted Phenols ◽  
Reverse Phase ◽  
Aromaticity Index ◽  
Structure Property Relationship ◽  
Layer Chromatography ◽  
Energy Of Formation

In a preceding study, the molecular hydrophobicity (RM0) was determined experimentally from reverse-phase thin-layer chromatography data for several substituted phenols and 2-(aryloxy-a-acetyl)-phenoxathiin derivatives, obtained from the corresponding phenoxides and 2-(a-bromoacetyl)-phenoxathiin. QSPR correlations for RM0 were explored using four calculated molecular descriptors: the water solubility parameter (log Sw), log P, the Gibbs energy of formation (DGf), and the aromaticity index (HOMA). Triparametric correlations do not improve substantially the biparametric correlation of RM0 in terms of log Sw and HOMA.

scholarly journals Variable, Optically Thick, Hot Plasma Observed in Interacting Binaries

1984 ◽  
Vol 80 ◽  
pp. 281-286
Author(s):  
Y. Kondo ◽  
G. E. McCluskey ◽  
S. B. Parsons
Keyword(s):  
Binary Systems ◽  
Ultraviolet Spectra ◽  
Hot Plasma ◽  
International Ultraviolet Explorer

AbstractWe report recent International Ultraviolet Explorer (IUE) observations of two interacting binaries, R Arae and HD 207739. The ultraviolet spectra indicate the presence of optically-thick, variable hot plasma in those binary systems. These two binaries may belong to a class of binaries that are currently undergoing a rarely observed and probably short-lived phase in their evolution. Their properties are compared with those of two other interacting binaries, U Cephei and ß Lyrae.

Search for Gold and Other Heavy Elements in the Ultraviolet Spectra of A-Type Stars

1995 ◽  
Vol 98 (3/4) ◽  
pp. 149
Author(s):  
K. I. McDavitt ◽  
J. W. Manweiler ◽  
J. P. Davidson
Keyword(s):  
Heavy Elements ◽  
Ultraviolet Spectra

PHYSICAL PROPERTIES OF ALKYL PYRROLES AND THEIR SALTS

1959 ◽  
Vol 37 (11) ◽  
pp. 1859-1869 ◽  
Author(s):  
R. J. Abraham ◽  
E. Bullock ◽  
S. S. Mitra
Keyword(s):  
Hydrochloric Acid ◽  
Physical Properties ◽  
Simple Function ◽  
Proton Resonance ◽  
Ultraviolet Spectra ◽  
Buffer Solutions

The structures of the ions formed by several alkyl pyrroles in hydrochloric acid are deduced from proton resonance spectra. Basicity values for three alkyl pyrroles are determined from ultraviolet spectra of their salts in buffer solutions. An attempt is made to estimate the basicity of other pyrroles from the variation of the—OD stretching frequency of methanol-d in solution in the pyrroles. Variations of the free and bonded NH frequencies of alkyl pyrroles are shown to be a simple function of the positions and number of the substituents.

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