| Symmetry point group | D2h | 
      
        | Symmetry elements | E     C2(z)     C2(y)
              C2(x)     i    
          &sigmah(xy)     &sigmah(xz)
              &sigmah(yz) | 
      
        | Irriducible representation &Gamma3N | 37 Ag + 37 B1g + 21 B2g + 16 B3g + 16 Au + 21 B1u + 37 B2u + 37 B3u | 
      
        | Irriducible representation &Gammavib | 37 Ag + 36 B1g + 20 B2g + 15 B3g + 16 Au + 20 B1u + 36 B2u + 36 B3u | 
      
        | Infrared active modes | 20 B1u + 36 B2u + 36 B3u | 
      
        | Single ionization energy (eV) | 
            
              | Adiab. = 5.37 | Vert. = 5.43 | (Exp. ) |  | 
      
        | Double ionization energy (eV) | 
            
              | Singlet: | Adiab. = 13.29 | Vert. = 13.51 | (Exp. ) |  
              | Triplet: | Adiab. = 14.00 | Vert. = 14.10 |  | 
      
        | Electron affinity (eV) | 
            
              | Adiab. = 2.17 | Vert. = 2.11 | (Exp. ) |  | 
      
        | Zero Point Energies (kcal/mol) | 
            
              | Anion = 362 | Neutral = 365 | Cation = 365 | Dication S = 367 |  | 
      
        | Static dipole polarizabilities (Å3) | 
            
              | Anion: | &alphaxx = 439 | &alphayy = 99 | &alphazz = 31 |  
              | Neutral: | &alphaxx = 396 | &alphayy = 97 | &alphazz = 36 |  
              | Cation: | &alphaxx = 417 | &alphayy = 95 | &alphazz = 35 |  
              | Dication S: | &alphaxx = 399 | &alphayy = 95 | &alphazz = 34 |  | 
      
        | Rotational constants(cm-1) | 
            
              | Anion: | A = 8.320e-03 | B = 6.877e-03 | C = 6.352e-04 |  
              | Neutral: | A = 8.362e-03 | B = 6.862e-04 | C = 6.342e-04 |  
              | Cation: | A = 8.330e-03 | B = 6.908e-04 | C = 6.379e-04 |  
              | Dication S: | A = 8.300e-03 | B = 6.941e-04 | C = 6.405e-04 |  
              | Dication T: | A = 8.323e-03 | B = 6.906e-04 | C = 6.377e-04 |  | 
      
        | van der Waals coefficients (a.u.)# | 
	    
	      | Average static polarizability | &alpha(0) = 1196 |  
            | Effective frequency | &omega1 = 0.156 |  
            | Homomolecular Hamaker constant (x10-3) | C6 = 168 |  
            | Coefficient of the retardated vdW interaction (x10-6) | KAA = 57.1 |  |