Studies of hydrogen bonding—XXXI. NMR studies of solute—solute—solvent interaction

1980 ◽  
Vol 36 (12) ◽  
pp. 1083-1088 ◽  
Author(s):  
Nils Futsaeter ◽  
Thor Gramstad
Keyword(s):  
Hydrogen Bonding ◽  
Nmr Studies ◽  
Solvent Interaction ◽  
Solute Solvent Interaction

Infrared Study of 4- and 3-Substituted Anilines in Hexane, Carbon Tetrachloride, or Chloroform (0.5% or Less) Solutions

1992 ◽  
Vol 46 (8) ◽  
pp. 1273-1278 ◽  
Author(s):  
R. A. Nyquist ◽  
D. A. Luoma ◽  
C. W. Puehl
Keyword(s):  
Hydrogen Bonding ◽  
Bond Angle ◽  
Frequency Separation ◽  
Intermolecular Hydrogen Bonding ◽  
Substituted Anilines ◽  
Infrared Study ◽  
Solvent Interaction ◽  
Solute Solvent Interaction ◽  
Cl Atoms ◽  
Ir Bands

As the NH2 bond angle increases, both vasym NH2 and vsym. NH2 increase in frequency, and the frequency separation between vasym. NH2 and vsym. NH2 increases as the Hammett σp and σm values increase (increasing electron withdrawing power). The NH2 bond angles change with solute/solvent interaction. In CHCl3 solution IR bands are observed for two sets of vasym. NH2 and vsym. NH2 frequencies. It is suggested that this is the result of intermolecular hydrogen bonding between H2N and HCCl3 and between NH2 and Cl(HCl2)2. In CCl4 solution the intermolecular hydrogen bonding between the NH2 protons and the Cl atoms of CCl4 is stronger than between the Cl atoms of CHCl3.

Vibrational Frequency Shifts of the Carbonyl Stretching Mode Induced by Solvents: Acetone

1989 ◽  
Vol 43 (6) ◽  
pp. 1053-1055 ◽  
Author(s):  
R. A. Nyquist ◽  
T. M. Kirchner ◽  
H. A. Fouchea
Keyword(s):  
Hydrogen Bonding ◽  
Vibrational Frequency ◽  
Molecular Geometry ◽  
Intermolecular Hydrogen Bonding ◽  
Acceptor Number ◽  
Frequency Shifts ◽  
Solvent Interaction ◽  
Precise Measure ◽  
Solvent Systems ◽  
Solute Solvent Interaction

Variation in the correlations obtained between electron acceptor number (AN) values for each solvent versus the vC=O frequencies for acetone and tetramethylurea in solution with these solvents suggests that the AN values are not a precise measure of solute/solvent interaction for all solute/solvent systems. Factors such as intermolecular hydrogen bonding between solute and solvent and the differences between molecular geometry of the solutes and solvents most likely account for differences in the solute/solvent interaction for different solutes in the same solvents.

The Py scale of solvent polarities

1984 ◽  
Vol 62 (11) ◽  
pp. 2560-2565 ◽  
Author(s):  
Dao Cong Dong ◽  
Mitchell A. Winnik
Keyword(s):  
Hydrogen Bonding ◽  
Dimethyl Sulfoxide ◽  
Vapor Phase ◽  
Solvent Polarity ◽  
Solvent Interaction ◽  
Pyrene Fluorescence ◽  
Solute Solvent Interaction

The relative intensities I1/I3 of the vibronic bands of pyrene fluorescence in 94 solvents and the vapor phase are reported. These values, ranging from 0.47 (vapor) to 1.95 (dimethyl sulfoxide) form the Py scale of solvent polarities. This scale is compared to other scales of solvent polarity, particularly the π* scale of Kamlet and Taft in order to assess the contributions of various factors (dipolarity/polarizability, hydrogen bonding, etc.) to the solute–solvent interaction.

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