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

using model chemistry: CID/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-293.411212
Energy at 298.15K-293.416467
Nuclear repulsion energy209.954109
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 CID/3-21G*
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 3345 3113 0.00      
2 Ag 1411 1313 0.00      
3 Ag 1006 936 0.00      
4 Ag 783 729 0.00      
5 Au 389 362 0.00      
6 B1u 3342 3110 3.62      
7 B1u 1233 1147 72.13      
8 B1u 1100 1024 2.98      
9 B2g 1059 985 0.00      
10 B2g 845 786 0.00      
11 B2u 1497 1393 20.41      
12 B2u 1106 1030 1.62      
13 B2u 599 557 39.15      
14 B3g 1538 1431 0.00      
15 B3g 1379 1284 0.00      
16 B3g 658 612 0.00      
17 B3u 1000 931 3.24      
18 B3u 363 337 64.62      

Unscaled Zero Point Vibrational Energy (zpe) 11326.4 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 10539.2 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 CID/3-21G*
ABC
0.21844 0.20918 0.10685

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.290
C2 0.000 0.000 -1.290
N3 0.000 1.200 0.681
N4 0.000 -1.200 0.681
N5 0.000 -1.200 -0.681
N6 0.000 1.200 -0.681
H7 0.000 0.000 2.365
H8 0.000 0.000 -2.365

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.58051.34551.34552.30722.30721.07453.6550
C22.58052.30722.30721.34551.34553.65501.0745
N31.34552.30722.39902.75831.36122.06763.2731
N41.34552.30722.39901.36122.75832.06763.2731
N52.30721.34552.75831.36122.39903.27312.0676
N62.30721.34551.36122.75832.39903.27312.0676
H71.07453.65502.06762.06763.27313.27314.7295
H83.65501.07453.27313.27312.06762.06764.7295

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 116.943 C1 N4 N5 116.943
C2 N5 N4 116.943 C2 N6 N3 116.943
N3 C1 N4 126.115 N3 C1 H7 116.943
N4 C1 H7 116.943 N5 C2 N6 126.115
N5 C2 H8 116.943 N6 C2 H8 116.943
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability