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

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-293.513353
Energy at 298.15K-293.518349
Nuclear repulsion energy207.203368
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 CCD/3-21G*
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 3232 3092 0.00      
2 Ag 1310 1253 0.00      
3 Ag 925 885 0.00      
4 Ag 747 715 0.00      
5 Au 352 336 0.00      
6 B1u 3230 3090 6.12      
7 B1u 1180 1129 52.64      
8 B1u 1055 1009 9.72      
9 B2g 1003 959 0.00      
10 B2g 800 765 0.00      
11 B2u 1447 1384 19.72      
12 B2u 1037 992 0.38      
13 B2u 498 477 28.86      
14 B3g 1459 1395 0.00      
15 B3g 1319 1262 0.00      
16 B3g 630 603 0.00      
17 B3u 947 906 3.47      
18 B3u 327 313 57.89      

Unscaled Zero Point Vibrational Energy (zpe) 10749.1 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 10281.5 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 CCD/3-21G*
ABC
0.21349 0.20298 0.10405

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.300
C2 0.000 0.000 -1.300
N3 0.000 1.218 0.694
N4 0.000 -1.218 0.694
N5 0.000 -1.218 -0.694
N6 0.000 1.218 -0.694
H7 0.000 0.000 2.383
H8 0.000 0.000 -2.383

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.59971.36021.36022.33612.33611.08353.6832
C22.59972.33612.33611.36021.36023.68321.0835
N31.36022.33612.43532.80291.38762.08263.3093
N41.36022.33612.43531.38762.80292.08263.3093
N52.33611.36022.80291.38762.43533.30932.0826
N62.33611.36021.38762.80292.43533.30932.0826
H71.08353.68322.08262.08263.30933.30934.7667
H83.68321.08353.30933.30932.08262.08264.7667

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 116.462 C1 N4 N5 116.462
C2 N5 N4 116.462 C2 N6 N3 116.462
N3 C1 N4 127.077 N3 C1 H7 116.462
N4 C1 H7 116.462 N5 C2 N6 127.077
N5 C2 H8 116.462 N6 C2 H8 116.462
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability