NMR Subspectral Analysis Applied to Polyfluorobenzenes C6HnF6−n. III. Pentafluorobenzene

The nuclear magnetic resonance spectra (¹H and ¹⁹F) of pentafluorobenzene at ${\nu }_0\text{\hspace{0.17em}=\hspace{0.17em}6.14}$ , 94.1, and 100.0 MHz have been analyzed. Subspectral analysis, perturbation theory, and direct analysis were applied to the low‐frequency spectra in order to obtain all the magnitudes and relative signs of the parameters. It was demonstrated that although at high frequencies a loss of information due to weak coupling should in principle arise, it is still possible to obtain the same results by exploitation of high‐precision measurements through computer iteration and by double irradiation (tickling).