The organic magnetic material TDAE-C-60 is investigated by magnetic susceptibility, ESR and Raman measurements. We find that, depending on preparation technique, the critical temperature (as determined by ESR) can vary from 16 to 24 K, the latter being the highest T-c reported so far for this compound or any non-polymeric organic material composed entirely of first-row elements. The ESR linewidths in the magnetic state - an indication of the magnitude of the internal field - vary between 15 and 50 Gauss. Rather unexpectedly, Raman spectra of the 16 K material do not show a clear 6 cm(-1) shift of the C-60 pentagonal pinch mode frequency relative to pure C-60 corresponding to transfer of one electron in the ground state. Instead we obtain a sharp line at 1466 cm(1) which would imply only a partial charge transfer from TDAE to C-60 i.e. a resonating molecular charge sharing between C-60 and TDAE molecules. In contrast, the 24 K sample shows a broad set of lines shifted to lower frequency implying that the higher T-c materials may be non-stoichiometric.