Geometrical and electronic properties of C m N 2 (m=1-14) positively and negatively charged clusters have been investigated by hybrid B3LYP functional at the respective 6-311G(d) and 6-311+G(d) levels. Our results revealed that C m N 2 (m=2-14) cationic ions and C m N 2 (m=6-14) anions form linear conformer with D ~ h symmetry except for C 1 1 N 2 + cationic ion whereas C m N 2 (m=1-5) anions form chain-like arrangements. Two N atoms favor to bond at ends in linear and chain-like configurations. Both calculated HOMO-LUMO gaps and adiabatic ionization potentials showed that the C m N 2 (m=1-14) clusters with even m are more stable than those with odd m. The second difference in energy for C m N 2 + (m=1-14) ions revealed that the cationic ions with even m are more stable than those with odd m, which is consistent with the observed cationic even-odd alternation of the TOF signal intensities. The relative stability of anions is in opposition to that of cationic clusters.