[en] The structure and vibrations of neutral porphine metal complexes (Me-P, Me = Co, Ni, Cu) and their d-anionic forms with an additional electron localized in vacant d_x²-y²- and d_z²-orbitals are compared based on calculations by a DFT method. It is shown that such electron population causes a significant increase of the electronic charge on the macrocycle rather than on the Me atom and is accompanied by a considerable redistribution of π- and σ-electron densities (ρ_π, ρ_σ). A predominant gain of ρ_π (0.49e) is found for the monoanion of Co-P (Co-P^-, d_z²-monoanion); of ρ_σ (0.6e), for Ni-P^- (d_x²-y²-mono anion). These features are reflected in both the structure of the anions and the behavior of their vibrational frequencies. The greatest frequency shifts among IR active modes when populating the d_z²- and d_x²-y²-orbitals occur for out-of-plane vibrations (>30 cm^-1) and in-plane modes (34-46 cm^-1) involving Men- and C_αC_m-bonds, respectively. Abnormally large frequency lowering is found for B_1g-type modes (active in the resonance Raman spectrum) involving mainly C_αC_m-, C_βC_β-, C_αC_β- and Men-bonds. This is related to a change in the d_π-e_g interaction strength during such vibrations that contributes to a decrease in the corresponding force constants. (authors)