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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G
 hartrees
Energy at 0K-293.526340
Energy at 298.15K-293.531302
Nuclear repulsion energy205.038602
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=FULL/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 3249 3102 0.00      
2 Ag 1224 1169 0.00      
3 Ag 836 798 0.00      
4 Ag 727 694 0.00      
5 Au 326 311 0.00      
6 B1u 3247 3101 4.90      
7 B1u 1157 1104 39.90      
8 B1u 1013 967 18.84      
9 B2g 1006 960 0.00      
10 B2g 794 758 0.00      
11 B2u 1433 1369 24.06      
12 B2u 989 944 1.11      
13 B2u 701 669 13.07      
14 B3g 1419 1355 0.00      
15 B3g 1269 1211 0.00      
16 B3g 613 585 0.00      
17 B3u 950 907 3.94      
18 B3u 273 261 60.23      

Unscaled Zero Point Vibrational Energy (zpe) 10611.7 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 10132.1 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/3-21G
ABC
0.20915 0.19851 0.10185

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.305
C2 0.000 0.000 -1.305
N3 0.000 1.231 0.710
N4 0.000 -1.231 0.710
N5 0.000 -1.231 -0.710
N6 0.000 1.231 -0.710
H7 0.000 0.000 2.388
H8 0.000 0.000 -2.388

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.61061.36781.36782.36152.36151.08263.6932
C22.61062.36152.36151.36781.36783.69321.0826
N31.36782.36152.46262.84241.41952.08143.3334
N41.36782.36152.46261.41952.84242.08143.3334
N52.36151.36782.84241.41952.46263.33342.0814
N62.36151.36781.41952.84242.46263.33342.0814
H71.08263.69322.08142.08143.33343.33344.7758
H83.69321.08263.33343.33342.08142.08144.7758

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 115.813 C1 N4 N5 115.813
C2 N5 N4 115.813 C2 N6 N3 115.813
N3 C1 N4 128.374 N3 C1 H7 115.813
N4 C1 H7 115.813 N5 C2 N6 128.374
N5 C2 H8 115.813 N6 C2 H8 115.813
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability