Nanosecond time-resolved resonance Raman spectra of the triplet states of DMABN, DMABN-d(6), and DMABN-N-15 have been obtained over the frequency range from 700 to 2300 cm(-1). Isotopic shifts identify modes associated with the dimethylaniline subgroup. There is no significant difference between spectra recorded in polar and nonpolar solvents implying that the lowest triplet state (T-3(1)) state has only one form. Our results characterize it as planar or near planar in structure, with a high negative charge localization on the cyano group and a substantial loosening of the ring skeleton with conjugation extending to the amino group. Nonradiative deactivation of the singlet intramolecular charge transfer state ((ICT)-I-1) through intersystem crossing is discussed in relation to the transient absorption spectra.