Spectroscopic studies of cyclopentyl compounds—II. Conformational isomerism and ν(C—Hal) frequencies of cyclopentyl mono-halides
1970; Pergamon Press; Volume: 26; Issue: 1 Linguagem: Inglês
10.1016/0584-8539(70)80251-3
ISSN1873-3824
AutoresI. O. C. Ekejiuba, H. E. Hallam,
Tópico(s)Advanced Chemical Physics Studies
ResumoA comprehensive temperature and solvent study has been made of the 800–400 cm−1 region of the infra-red for chloro-, bromo-, and iodo-cyclopentane, and in the 1200–950 cm−1 region for cyclopentyl fluoride. In the case of the fluoride and the chloride, the results are interpreted in terms of the presence of equatorial and axial conformers, the axial conformer being more dominant. The enthalpy difference between the two conformers of cyclopentyl chloride in CS2 solution is estimated to be 0–7 ± 0.3 kcal.mole−1. The existence of equatorial and axial conformers in cyclopentyl chloride is confirmed by the presence of a similar ν(C-D) doublet in the spectrum of the α-deuterated compound.
Referência(s)