We describe a procedure for measuring relative longitudinal relaxation times of protons In chlorinated polyaromatic hydrocarbons. The results Indicate that these times are dependent on Interproton distances and thus can be used to distinguish protons with ortho-proton neighbors from those without ortho-proton neighbors. In addition, the longitudinal relaxation time can also qualitatively describe inter-ring Interactions under certain conditions. The measurement Is used for structural elucidation of three cases of unknown chlorinated polyaromatic hydrocarbons, and In each case an unambiguous assignment Is possible. The use of relative proton longitudinal relaxation times for structural Identification should be broadly applicable to many structural problems.
All Science Journal Classification (ASJC) codes
- Analytical Chemistry