Effect of substituents on intramolecular hydrogen hydrogen bonds of 2-hydroxy-5-substituted acetophenones
β Scribed by Zen-ichi Yoshida; Masami Haruta
- Publisher
- Elsevier Science
- Year
- 1964
- Tongue
- French
- Weight
- 199 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The spectroscopic study of intramolecular hydrogen bonds of a large nu!nber of compounds was developed by Wulf et al (1). They showed that the change in frequency of vibration occurs at about 7000 cm-l (in wave-number units) corresponding essentially to th? stretching of O-H and N-H bonds in molecules containing these groups.
Cullinane and his co-workers (2) reported that the carbonyl stretching
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## Abstract Chemical shifts of Hβbonded protons in tetrabutylammonium hydrogen maleate and 14βsubstituted picolinic acid __N__βoxides have been measured in a number of dry solvents, of different activity, in order to distinguish between symmetrical single minimum and asymmetrical hydrogen bonds. In
Dimerization energies, ED, internuclear separations, R, and directionality angles have been obtained for the electron donor substituted hydrogen bonds, HO-H\*\*+OHX, X=H, CH3, NH2, OH, and F, from ab initio -molecular orbital calculations with the 4-31G basis. The internuclear separations and direct