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

using model chemistry: MP2=FULL/6-31G*

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/6-31G*
 hartrees
Energy at 0K-295.509168
Energy at 298.15K-295.514355
Nuclear repulsion energy211.226453
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/6-31G*
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 3277 3088 0.00      
2 Ag 1446 1363 0.00      
3 Ag 1017 959 0.00      
4 Ag 751 707 0.00      
5 Au 341 321 0.00      
6 B1u 3276 3087 4.52      
7 B1u 1234 1162 64.52      
8 B1u 1109 1045 0.07      
9 B2g 985 928 0.00      
10 B2g 805 758 0.00      
11 B2u 1485 1399 6.81      
12 B2u 1230 1159 0.38      
13 B2u 1082 1020 29.55      
14 B3g 1563 1473 0.00      
15 B3g 1344 1266 0.00      
16 B3g 640 603 0.00      
17 B3u 925 872 1.42      
18 B3u 266 250 57.68      

Unscaled Zero Point Vibrational Energy (zpe) 11387.5 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 10729.3 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/6-31G*
ABC
0.22523 0.20801 0.10814

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.268
C2 0.000 0.000 -1.268
N3 0.000 1.203 0.670
N4 0.000 -1.203 0.670
N5 0.000 -1.203 -0.670
N6 0.000 1.203 -0.670
H7 0.000 0.000 2.353
H8 0.000 0.000 -2.353

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.53561.34341.34342.28042.28041.08533.6209
C22.53562.28042.28041.34341.34343.62091.0853
N31.34342.28042.40572.75331.33912.06913.2532
N41.34342.28042.40571.33912.75332.06913.2532
N52.28041.34342.75331.33912.40573.25322.0691
N62.28041.34341.33912.75332.40573.25322.0691
H71.08533.62092.06912.06913.25323.25324.7062
H83.62091.08533.25323.25322.06912.06914.7062

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 116.445 C1 N4 N5 116.445
C2 N5 N4 116.445 C2 N6 N3 116.445
N3 C1 N4 127.111 N3 C1 H7 116.445
N4 C1 H7 116.445 N5 C2 N6 127.111
N5 C2 H8 116.445 N6 C2 H8 116.445
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability