Variable-wavelength excitation resonance Raman (RR) spectra are reported for the electrochemically reduced monoanion radicals of vanadyl complexes of octaethylporphyrin and etioporphyrin-I as well as their meso-d(4) and pyrrole-N-15 isotopomers. Drastic alterations in spectral properties are found for the anion radicals : (1) the depolarization ratio (rho) of skeletal modes are scrambled, i.e., rho > 1/8 for A(1g) modes and <(3/4) for B-1g modes; (2) several B-1g modes gain dominant intensity; (3) pairs of A(1g) and B-1g modes of the same local coordinate exhibit disparate frequency shift patterns, most notably, nu(2) and nu(11) (C-beta-C-beta stretching), which are shifted down 11 and 53 cm(-1), respectively; and (4) the isotope shifts of several modes are significantly altered, e.g., nu(4) acquired 5-cm(-1) meso-d(4) sensitivity. These changes imply lowering of the porphyrin symmetry in the anion radical ground state, which is attributed to a static Jahn-Teller effect. The observed frequencies and isotope shifts for the high-frequency skeletal modes of the anion radicals are satisfactorily reproduced in a normal-mode calculation by adjusting the bond stretch force constants of the neutral parent according to the nodal pattern of the e(g)(*) orbitals. The relative intensities of high-frequency RR bands are found to vary markedly as the excitation wavelengths are tuned throughout the absorption band centered at 456 nm, implying the presence of multiple electronic transitions.