Abstract
The concentration dependence of the chemical shift of the diethylamine NH proton was studied both in the hydrogen-bonding solvent acetonitrile and in the nonhydrogen-bonding solvent cyclohexane. In the cyclohexane solutions the N-H-N bonds in pure diethylamine break upon dilution and the resonance position of the N-H peak changes toward higher magnetic fields, whereas in acetonitrile solutions the N-H resonance changes systematically toward lower fields as the concentration of amine decreases. Thus, the N-H group of diethylamine forms a stronger hydrogen bond with acetonitrile than with itself. Rapid exchange of the diethylamine N-H proton appears to result from trace amounts of water present in acetonitrile and cyclohexane.
Original language | English (US) |
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Pages (from-to) | 481-486 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry |
Volume | 70 |
Issue number | 2 |
DOIs | |
State | Published - 1966 |
Externally published | Yes |
ASJC Scopus subject areas
- General Engineering
- Physical and Theoretical Chemistry