✦ LIBER ✦

Infrared and Raman spectra of DL-histidinium dinitrate and L-histidinium sulphamate

✍ Scribed by Beulah J. M. Rajkumar; V. Ramakrishnan; S. Asath Bahadur

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 92 KB
Volume: 30
Category: Article
ISSN: 0377-0486
DOI: 10.1002/(sici)1097-4555(199907)30:7<589::aid-jrs424>3.0.co;2-#

No coin nor oath required. For personal study only.

✦ Synopsis

A comparative study of the infrared and Raman spectra of DL-histidinium dinitrate and L-histidinium sulphamate helps in determining the effect of hydrogen bonding in these crystals. The nitrate compound has a carboxylic group whereas the sulphamate compound has an ionized carboxyl group. However, the protonated imidazolium ring makes the histidine group in both cases ionic. Several group wavenumbers have been shifted in both molecules, indicating extensive hydrogen bonding. Some of the forbidden modes of the nitrate group have been observed. The removal of degeneracy of certain modes of both the nitrate and sulphamate anions suggests that the symmetry of both of these groups have been affected in their respective environments.

📜 SIMILAR VOLUMES

Infrared and Raman spectra of L-valine n

Infrared and Raman spectra of L-valine nitrate and L-leucine nitrate

✍ Beulah J. M. Rajkumar; V. Ramakrishnan 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 95 KB 👁 2 views

A comparative study of the infrared and Raman spectra of L-valine nitrate and L-leucine nitrate helps in determining the role of hydrogen bonds in these crystals. Both compounds have carboxylic and protonated amino groups in the cation while the nitrate ion forms the anion. The wavenumbers of severa

Raman and infrared spectra of solid 2,3-

Raman and infrared spectra of solid 2,3-dimethylbutyne

✍ L. Rintoul; H. F. Shurvell 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 285 KB 👁 2 views

The infrared and Raman spectra of polycrystalline were recorded at 77 and 10 K, respectively. (CH 3 ) 3 CCCH Crystal splittings were observed for some of the fundamentals and possible crystal structures are discussed. Anomalous band shifts between the liquid and solid state spectra were noted for bu

Raman and Infrared Spectra of Nd-Doped B

Raman and Infrared Spectra of Nd-Doped Barium Sodium Niobate Crystals

✍ H.-R. Xia; L.-X. Li; H. Yu; X.-L. Meng; L. Zhu; L.-J. Hu 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 106 KB 👁 2 views

Raman and far-infrared spectra of weak f

Raman and far-infrared spectra of weak ferroelectric cyclohexane-1,1′-diacetic acid

✍ Yu. I. Yuzyuk; R. Farhi; S. Kamba; J. Petzelt; P. Vanek; L. M. Rabkin 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 109 KB 👁 2 views

Polarized Raman spectra of the new weak ferroelectric crystal cyclohexane-1,1 -diacetic acid [C 6 H 10 (CH 2 COOH) 2 ] were studied in the temperature range 300-420 K and spectral range 10-3500 cm -1 . Wavenumbers of external modes were compared with the modes observed in far-infrared transmission s