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

using model chemistry: G2

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at G2
 hartrees
Energy at 0K-295.874881
Energy at 298.15K-295.880753
Nuclear repulsion energy216.354154
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 HF/6-31G*
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 3447 3248 0.00      
2 Ag 1733 1633 0.00      
3 Ag 1178 1110 0.00      
4 Ag 825 778 0.00      
5 Au 451 425 0.00      
6 B1u 3445 3246 9.27      
7 B1u 1380 1301 79.95      
8 B1u 1191 1122 6.42      
9 B2g 1103 1039 0.00      
10 B2g 898 846 0.00      
11 B2u 1647 1552 0.99      
12 B2u 1274 1200 23.59      
13 B2u 886 835 99.92      
14 B3g 1792 1688 0.00      
15 B3g 1449 1366 0.00      
16 B3g 707 666 0.00      
17 B3u 1035 975 1.17      
18 B3u 409 386 57.79      

Unscaled Zero Point Vibrational Energy (zpe) 12424.9 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 11706.8 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=FULL/6-31G*
ABC
0.22523 0.20801 0.10814

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.268
C2 0.000 0.000 -1.268
N3 0.000 1.203 0.670
N4 0.000 -1.203 0.670
N5 0.000 -1.203 -0.670
N6 0.000 1.203 -0.670
H7 0.000 0.000 2.353
H8 0.000 0.000 -2.353

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.53561.34341.34342.28042.28041.08533.6209
C22.53562.28042.28041.34341.34343.62091.0853
N31.34342.28042.40572.75331.33912.06913.2532
N41.34342.28042.40571.33912.75332.06913.2532
N52.28041.34342.75331.33912.40573.25322.0691
N62.28041.34341.33912.75332.40573.25322.0691
H71.08533.62092.06912.06913.25323.25324.7062
H83.62091.08533.25323.25322.06912.06914.7062

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 117.449 C1 N4 N5 117.449
C2 N5 N4 117.449 C2 N6 N3 117.449
N3 C1 N4 125.102 N3 C1 H7 117.449
N4 C1 H7 117.449 N5 C2 N6 125.102
N5 C2 H8 117.449 N6 C2 H8 117.449
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability