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

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-295.621370
Energy at 298.15K-295.626376
HF Energy-294.669509
Nuclear repulsion energy212.000985
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/TZVP
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 3267 3097 0.00      
2 Ag 1427 1353 0.00      
3 Ag 1012 959 0.00      
4 Ag 756 717 0.00      
5 Au 296 281 0.00      
6 B1u 3265 3095 3.16      
7 B1u 1221 1157 57.11      
8 B1u 1103 1046 0.36      
9 B2g 877 831 0.00      
10 B2g 586 556 0.00      
11 B2u 1483 1406 4.33      
12 B2u 1201 1138 0.06      
13 B2u 1065 1009 31.29      
14 B3g 1543 1463 0.00      
15 B3g 1348 1277 0.00      
16 B3g 636 603 0.00      
17 B3u 876 830 1.06      
18 B3u 253 240 56.70      

Unscaled Zero Point Vibrational Energy (zpe) 11107.5 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 10528.8 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/TZVP
ABC
0.22723 0.20921 0.10892

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.262
C2 0.000 0.000 -1.262
N3 0.000 1.199 0.667
N4 0.000 -1.199 0.667
N5 0.000 -1.199 -0.667
N6 0.000 1.199 -0.667
H7 0.000 0.000 2.343
H8 0.000 0.000 -2.343

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52421.33911.33912.27122.27121.08103.6052
C22.52422.27122.27121.33911.33913.60521.0810
N31.33912.27122.39882.74441.33332.06133.2399
N41.33912.27122.39881.33332.74442.06133.2399
N52.27121.33912.74441.33332.39883.23992.0613
N62.27121.33911.33332.74442.39883.23992.0613
H71.08103.60522.06132.06133.23993.23994.6862
H83.60521.08103.23993.23992.06132.06134.6862

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 116.403 C1 N4 N5 116.403
C2 N5 N4 116.403 C2 N6 N3 116.403
N3 C1 N4 127.194 N3 C1 H7 116.403
N4 C1 H7 116.403 N5 C2 N6 127.194
N5 C2 H8 116.403 N6 C2 H8 116.403
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability