Integrated intensity of OH absorption bands in bent hydrogen bonds in ortho-dialkylaminomethyl phenols

✍ Scribed by A. Filarowski; A. Kollxaa

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 782 KB
• Volume: 12
• Category: Article
• ISSN: 0924-2031
• DOI: 10.1016/0924-2031(96)00010-0

✦ Synopsis

The FT-IR spectra of 16 o&o-Mannich bases and its deuteroanalogues in the region of u,(OH/OD) absorption bands were determined in CCI, solution. Separation of v,(CH) bands was achieved by applying the technique of deuterium substitution at the phenolic OH group. The spectroscopic effect of this substitution on the v,(CH) absorption bands was discovered, which demonstrates that the OH . . . N hydrogen bonds are stronger than in the analogous OD . . N complexes. It was shown that the integrated intensity of the u&OH) bands in bent hydrogen bonds is distinctly lower than in the respective linear ones. A good correlation of the integrated intensity with the hydrogen bond strength was obtained.