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5.1.4 Cyclopentadienyl neutral radical [a004]

This is an example of a monocyclic hydrocarbon where all the hydrogens are equivalent in dissolution and in solid state (T = 120 K). This suggests that even at low temperature the radical presents a fast rotation in its own plane giving a set of five equivalent protons and presenting a sextet (see Fig. 7).

\begin{figure}\centerline{\psfig{figure=a004.ps,width=4.0cm}} % \end{figure}

Figure 7: EPR spectrum of the cyclopentadienyl neutral radical.
\begin{figure}\centerline{\psfig{figure=a004esp.ps,width=16.0cm}} \end{figure}

Simulator

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Universidad Autónoma de Madrid, Departamento de Química Física Aplicada