Study of Molecular Orbital Degeneracy in C5H5

Publisher Website
Google Scholar
Abstract
The paramagnetic resonance of the cyclopentadienyl radical (C5H5) has been observed in a single oriented crystal of cyclopentadiene at temperatures ranging from 25° to 150°K. The spectra are of two types, high-temperature and low-temperature spectra, with the transition occurring reversibly between 70°K and 120°K. The high-temperature spectra consist of six equally spaced lines with a splitting of 6.2 G and can be accounted for in terms of a uniform spin distribution around the ring and rapid reorientation of the ring in its plane. The low-temperature spectra are slightly anisotropic and can be reasonably well accounted for by a distorted C5H5 radical with a nonuniform spin distribution undergoing rapid reorientation in its molecular plane.

This publication has 12 references indexed in Scilit: