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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CBS-Q
 hartrees
Energy at 0K-295.886170
Energy at 298.15K-295.892035
Nuclear repulsion energy216.453576
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 CBS-Q
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 3427 3427 0.00      
2 Ag 1730 1730 0.00      
3 Ag 1176 1176 0.00      
4 Ag 827 827 0.00      
5 Au 448 448 0.00      
6 B1u 3425 3425 8.09      
7 B1u 1376 1376 79.05      
8 B1u 1193 1193 7.07      
9 B2g 1096 1096 0.00      
10 B2g 899 899 0.00      
11 B2u 1640 1640 0.78      
12 B2u 1272 1272 25.16      
13 B2u 875 875 98.40      
14 B3g 1788 1788 0.00      
15 B3g 1440 1440 0.00      
16 B3g 705 705 0.00      
17 B3u 1029 1029 0.97      
18 B3u 409 409 58.01      

Unscaled Zero Point Vibrational Energy (zpe) 12376.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12376.7 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 CBS-Q
ABC
0.22609 0.20689 0.10803

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.251
C2 0.000 0.000 -1.251
N3 0.000 1.170 0.644
N4 0.000 -1.170 0.644
N5 0.000 -1.170 -0.644
N6 0.000 1.170 -0.644
H7 0.000 0.000 2.326
H8 0.000 0.000 -2.326

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.50261.31821.31822.22772.22771.07423.5769
C22.50262.22772.22771.31821.31823.57691.0742
N31.31822.22772.34022.67161.28862.04833.1921
N41.31822.22772.34021.28862.67162.04833.1921
N52.22771.31822.67161.28862.34023.19212.0483
N62.22771.31821.28862.67162.34023.19212.0483
H71.07423.57692.04832.04833.19213.19214.6511
H83.57691.07423.19213.19212.04832.04834.6511

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 117.418 C1 N4 N5 117.418
C2 N5 N4 117.418 C2 N6 N3 117.418
N3 C1 N4 125.165 N3 C1 H7 117.418
N4 C1 H7 117.418 N5 C2 N6 125.165
N5 C2 H8 117.418 N6 C2 H8 117.418
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability