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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-293.531291
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 3080 0.00      
2 Ag 1224 1161 0.00      
3 Ag 836 793 0.00      
4 Ag 727 689 0.00      
5 Au 326 309 0.00      
6 B1u 3247 3078 4.90      
7 B1u 1157 1096 39.90      
8 B1u 1013 960 18.84      
9 B2g 1006 954 0.00      
10 B2g 794 752 0.00      
11 B2u 1433 1359 24.06      
12 B2u 989 938 1.11      
13 B2u 701 664 13.07      
14 B3g 1419 1345 0.00      
15 B3g 1269 1203 0.00      
16 B3g 613 581 0.00      
17 B3u 950 901 3.94      
18 B3u 273 259 60.23      

Unscaled Zero Point Vibrational Energy (zpe) 10611.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 10059.9 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