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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-291.217378
Energy at 298.15K-291.221871
Nuclear repulsion energy200.973226
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/STO-3G
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 3493 3046 0.00      
2 Ag 1327 1157 0.00      
3 Ag 929 810 0.00      
4 Ag 706 615 0.00      
5 Au 299 261 0.00      
6 B1u 3496 3048 15.50      
7 B1u 1167 1017 43.77      
8 B1u 1080 942 13.99      
9 B2g 980 855 0.00      
10 B2g 791 690 0.00      
11 B2u 1465 1277 29.51      
12 B2u 1041 908 4.78      
13 B2u 514 449 26.14      
14 B3g 1488 1298 0.00      
15 B3g 1297 1131 0.00      
16 B3g 621 542 0.00      
17 B3u 902 786 0.05      
18 B3u 276 241 26.04      

Unscaled Zero Point Vibrational Energy (zpe) 10935.8 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 9534.9 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/STO-3G
ABC
0.20806 0.18436 0.09775

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.302
C2 0.000 0.000 -1.302
N3 0.000 1.278 0.715
N4 0.000 -1.278 0.715
N5 0.000 -1.278 -0.715
N6 0.000 1.278 -0.715
H7 0.000 0.000 2.409
H8 0.000 0.000 -2.409

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.60301.40571.40572.38762.38761.10723.7103
C22.60302.38762.38761.40571.40573.71031.1072
N31.40572.38762.55532.92871.43092.12123.3754
N41.40572.38762.55531.43092.92872.12123.3754
N52.38761.40572.92871.43092.55533.37542.1212
N62.38761.40571.43092.92872.55533.37542.1212
H71.10723.71032.12122.12123.37543.37544.8175
H83.71031.10723.37543.37542.12122.12124.8175

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 114.641 C1 N4 N5 114.641
C2 N5 N4 114.641 C2 N6 N3 114.641
N3 C1 N4 130.718 N3 C1 H7 114.641
N4 C1 H7 114.641 N5 C2 N6 130.718
N5 C2 H8 114.641 N6 C2 H8 114.641
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability