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

using model chemistry: MP2/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/6-31+G**
 hartrees
Energy at 0K-295.518552
Energy at 298.15K-295.523675
Nuclear repulsion energy210.953582
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 MP2/6-31+G**
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 3303 3106 0.00      
2 Ag 1438 1353 0.00      
3 Ag 1010 950 0.00      
4 Ag 746 702 0.00      
5 Au 313 294 0.00      
6 B1u 3302 3106 2.17      
7 B1u 1224 1151 56.84      
8 B1u 1103 1038 0.24      
9 B2g 965 908 0.00      
10 B2g 756 711 0.00      
11 B2u 1476 1389 3.68      
12 B2u 1229 1156 1.32      
13 B2u 1078 1014 28.60      
14 B3g 1551 1459 0.00      
15 B3g 1337 1258 0.00      
16 B3g 637 599 0.00      
17 B3u 918 863 1.71      
18 B3u 252 237 59.40      

Unscaled Zero Point Vibrational Energy (zpe) 11318.2 cm-1
Scaled (by 0.9406) Zero Point Vibrational Energy (zpe) 10645.9 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 MP2/6-31+G**
ABC
0.22473 0.20731 0.10783

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.270
C2 0.000 0.000 -1.270
N3 0.000 1.205 0.670
N4 0.000 -1.205 0.670
N5 0.000 -1.205 -0.670
N6 0.000 1.205 -0.670
H7 0.000 0.000 2.351
H8 0.000 0.000 -2.351

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.54051.34611.34612.28392.28391.08103.6215
C22.54052.28392.28391.34611.34613.62151.0810
N31.34612.28392.40982.75731.34012.06843.2527
N41.34612.28392.40981.34012.75732.06843.2527
N52.28391.34612.75731.34012.40983.25272.0684
N62.28391.34611.34012.75732.40983.25272.0684
H71.08103.62152.06842.06843.25273.25274.7025
H83.62151.08103.25273.25272.06842.06844.7025

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 116.480 C1 N4 N5 116.480
C2 N5 N4 116.480 C2 N6 N3 116.480
N3 C1 N4 127.041 N3 C1 H7 116.480
N4 C1 H7 116.480 N5 C2 N6 127.041
N5 C2 H8 116.480 N6 C2 H8 116.480
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability