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

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-51.670693
Energy at 298.15K-51.675775
Nuclear repulsion energy106.435514
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/CEP-121G*
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 3251 3097 0.00      
2 Ag 1414 1347 0.00      
3 Ag 983 937 0.00      
4 Ag 730 696 0.00      
5 Au 321 306 0.00      
6 B1u 3250 3097 4.95      
7 B1u 1200 1143 56.18      
8 B1u 1083 1032 0.75      
9 B2g 908 866 0.00      
10 B2g 761 725 0.00      
11 B2u 1454 1385 5.15      
12 B2u 1199 1142 0.74      
13 B2u 1059 1009 29.56      
14 B3g 1522 1450 0.00      
15 B3g 1310 1248 0.00      
16 B3g 622 592 0.00      
17 B3u 881 840 3.71      
18 B3u 257 244 59.28      

Unscaled Zero Point Vibrational Energy (zpe) 11101.9 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 10577.9 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/CEP-121G*
ABC
0.22186 0.20400 0.10628

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.277
C2 0.000 0.000 -1.277
N3 0.000 1.215 0.676
N4 0.000 -1.215 0.676
N5 0.000 -1.215 -0.676
N6 0.000 1.215 -0.676
H7 0.000 0.000 2.363
H8 0.000 0.000 -2.363

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.55321.35491.35492.29982.29981.08683.6399
C22.55322.29982.29981.35491.35493.63991.0868
N31.35492.29982.42932.78041.35252.07893.2733
N41.35492.29982.42931.35252.78042.07893.2733
N52.29981.35492.78041.35252.42933.27332.0789
N62.29981.35491.35252.78042.42933.27332.0789
H71.08683.63992.07892.07893.27333.27334.7267
H83.63991.08683.27333.27332.07892.07894.7267

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 116.301 C1 N4 N5 116.301
C2 N5 N4 116.301 C2 N6 N3 116.301
N3 C1 N4 127.399 N3 C1 H7 116.301
N4 C1 H7 116.301 N5 C2 N6 127.399
N5 C2 H8 116.301 N6 C2 H8 116.301
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability