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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-293.515925
Energy at 298.15K-293.520874
Nuclear repulsion energy205.008642
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 MP2/3-21G*
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 3248 3090 0.00      
2 Ag 1224 1164 0.00      
3 Ag 836 795 0.00      
4 Ag 727 691 0.00      
5 Au 326 310 0.00      
6 B1u 3247 3089 4.95      
7 B1u 1156 1100 39.82      
8 B1u 1013 964 18.92      
9 B2g 1005 957 0.00      
10 B2g 793 755 0.00      
11 B2u 1433 1363 24.03      
12 B2u 989 941 1.12      
13 B2u 700 666 13.18      
14 B3g 1418 1349 0.00      
15 B3g 1268 1206 0.00      
16 B3g 613 583 0.00      
17 B3u 949 903 3.95      
18 B3u 273 260 60.26      

Unscaled Zero Point Vibrational Energy (zpe) 10608.7 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 10092.1 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 MP2/3-21G*
ABC
0.20909 0.19845 0.10182

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

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
C12.61091.36801.36802.36182.36181.08273.6936
C22.61092.36182.36181.36801.36803.69361.0827
N31.36802.36182.46302.84291.41972.08163.3338
N41.36802.36182.46301.41972.84292.08163.3338
N52.36181.36802.84291.41972.46303.33382.0816
N62.36181.36801.41972.84292.46303.33382.0816
H71.08273.69362.08162.08163.33383.33384.7762
H83.69361.08273.33383.33382.08162.08164.7762

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 115.810 C1 N4 N5 115.810
C2 N5 N4 115.810 C2 N6 N3 115.810
N3 C1 N4 128.380 N3 C1 H7 115.810
N4 C1 H7 115.810 N5 C2 N6 128.380
N5 C2 H8 115.810 N6 C2 H8 115.810
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability