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All results from a given calculation for C2H2N4 (sym-tetrazine)

using model chemistry: MP2/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/SDD
 hartrees
Energy at 0K-295.069928
Energy at 298.15K-295.074859
Nuclear repulsion energy203.525888
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/SDD
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3256 3143 0.00      
2 Ag 1259 1216 0.00      
3 Ag 859 829 0.00      
4 Ag 699 675 0.00      
5 Au 340 328 0.00      
6 B1u 3256 3143 2.55      
7 B1u 1145 1105 28.10      
8 B1u 1008 973 24.03      
9 B2g 879 848 0.00      
10 B2g 781 754 0.00      
11 B2u 1391 1342 17.84      
12 B2u 1001 966 0.57      
13 B2u 817 788 25.71      
14 B3g 1397 1349 0.00      
15 B3g 1248 1204 0.00      
16 B3g 610 588 0.00      
17 B3u 865 835 4.45      
18 B3u 267 257 69.07      

Unscaled Zero Point Vibrational Energy (zpe) 10538.2 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 10172.5 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/SDD
ABC
0.20715 0.19450 0.10031

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.322
C2 0.000 0.000 -1.322
N3 0.000 1.244 0.703
N4 0.000 -1.244 0.703
N5 0.000 -1.244 -0.703
N6 0.000 1.244 -0.703
H7 0.000 0.000 2.411
H8 0.000 0.000 -2.411

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.64431.38931.38932.37692.37691.08903.7333
C22.64432.37692.37691.38931.38933.73331.0890
N31.38932.37692.48782.85801.40662.11283.3537
N41.38932.37692.48781.40662.85802.11283.3537
N52.37691.38932.85801.40662.48783.35372.1128
N62.37691.38931.40662.85802.48783.35372.1128
H71.08903.73332.11282.11283.35373.35374.8223
H83.73331.08903.35373.35372.11282.11284.8223

picture of sym-tetrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 N6 116.450 C1 N4 N5 116.450
C2 N5 N4 116.450 C2 N6 N3 116.450
N3 C1 N4 127.100 N3 C1 H7 116.450
N4 C1 H7 116.450 N5 C2 N6 127.100
N5 C2 H8 116.450 N6 C2 H8 116.450
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability