Solvent Effects and Hydrogen Bonding

1980 ◽  
pp. 253-258
Author(s):  
EDWIN D. BECKER
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Effects

STRUCTURAL AND SOLVENT EFFECTS ON THE n → π*(′U ← ′A) TRANSITIONS IN ALIPHATIC CARBONYL DERIVATIVES: EVIDENCE FOR HYPERCONJUGATION IN THE ELECTRONICALLY EXCITED STATES OF MOLECULES

1960 ◽  
Vol 38 (12) ◽  
pp. 2508-2513 ◽  
Author(s):  
C. N. R. Rao ◽  
G. K. Goldman ◽  
A. Balasubramanian
Keyword(s):  
Hydrogen Bonding ◽  
Carbonyl Group ◽  
Excited States ◽  
Solvent Effects ◽  
Electronically Excited States ◽  
Carbonyl Derivatives ◽  
Alkyl Groups ◽  
Electronically Excited

The n → π* transition of the carbonyl group has been studied in solvents of varying degree of polarity and hydrogen-bonding ability, in a number of aliphatic carbonyl derivatives. Evidence for hyperconjugation of the alkyl groups in the electronically excited states of molecules has been presented.

scholarly journals Solvent Effects on the Hydrogen Bonding of N-Phenylurethane

1969 ◽  
Vol 72 (11) ◽  
pp. 2430-2436 ◽  
Author(s):  
Takehide TANAKA ◽  
Tetsuo YOKOYAMA ◽  
Yukio YAMAGUCHI ◽  
Seikou NAGANUMA
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Effects

Selective deshielding of aromatic protons in some ortho-substituted acetanilides

1968 ◽  
Vol 46 (15) ◽  
pp. 2593-2600 ◽  
Author(s):  
James R. Bartels-Keith ◽  
Ronald F. W. Cieciuch
Keyword(s):  
Hydrogen Bonding ◽  
Magnetic Resonance ◽  
Solvent Effects ◽  
Proton Magnetic Resonance ◽  
Aromatic Proton ◽  
Intramolecular Hydrogen Bonding ◽  
Low Field ◽  
Intramolecular Hydrogen

Certain ortho-substituted acetanilides exhibit proton magnetic resonance signals at unusually low field for the amido proton and the aromatic proton adjacent to the acetamido group. This effect, explicable in terms of intramolecular hydrogen-bonding, has been observed for nitro, carbonyl, sulfamoyl, and sulfonyl substituents. Solvent effects are discussed.

Basicity and solvent effects on hydrogen bonding in NR3���HCOOH (R=H, CH3) model systems

1999 ◽  
Vol 74 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Patricia P�rez ◽  
Gerald Zapata-Torres ◽  
Julia Parra-Mouchet ◽  
Renato Contreras
Keyword(s):  
Hydrogen Bonding ◽  
Solvent Effects ◽  
Model Systems
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