𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Rotational dynamics of the methyl group in the 4-methyl pyridine crystal

✍ Scribed by L. Soulard; F. Fillaux; G. Braathen; N. Le Calvé; B. Pasquier

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
528 KB
Volume
125
Category
Article
ISSN
0009-2614

No coin nor oath required. For personal study only.

✦ Synopsis

Raman spectra below 150 cm-' of the 4-methyl pyridine crystal, and its deuterated derivative (d,), at various temperatures from 276.8 K (melting point) to 5 K are presented and vibrational assignments proposed. Three crystal phases are observed between 5-100 K (III), loo-254 K (II) and 254-276.8 K (I). In phase III, where the site symmetry for the molecule is C,, different potential shapes are compared and only a non-periodic function accounts satisfactorily for the five TCH, and two TCD~ Raman bands. A molecular model is proposed where the methyl groups are correlated along infinite chains in the crystal.

📜 SIMILAR VOLUMES

The spectrum of rotating wavepackets of
The spectrum of rotating wavepackets of hindered methyl groups
✍ S. Clough; A.J. Horsewill; A.M. Alsanoosi; M.J. Barlow; M.R. Johnson 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 555 KB

The wavefunction of a quantum system driven by a thermal environment localises when environmentally induced motion overtakes oscillations of the undriven system. The slowing down of the oscillations with increasing temperature is an important aspect of the transition from wave-lie to particle-like b

Hindered internal rotation of the methyl
Hindered internal rotation of the methyl group by ESR
✍ Kuang S Chen; Jay K Kochi 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 290 KB

Selecrive line broadening of the ESR spectrum of u,adifIuoroethyi radial shows hindered internal rotation of tho methyl group, from which 3 barrier of 1.1 kul mole -' is obtained by !ineshape analysis.