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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-295.662505
Energy at 298.15K-295.667727
Nuclear repulsion energy211.928662
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 MP2/6-31G(2df,p)
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 3263 3082 0.00      
2 Ag 1442 1362 0.00      
3 Ag 1020 963 0.00      
4 Ag 746 705 0.00      
5 Au 347 327 0.00      
6 B1u 3263 3082 2.36      
7 B1u 1223 1155 65.23      
8 B1u 1104 1043 0.30      
9 B2g 1014 958 0.00      
10 B2g 823 778 0.00      
11 B2u 1469 1388 5.12      
12 B2u 1248 1179 0.68      
13 B2u 1090 1029 27.16      
14 B3g 1545 1459 0.00      
15 B3g 1332 1258 0.00      
16 B3g 634 599 0.00      
17 B3u 944 891 0.58      
18 B3u 263 248 52.03      

Unscaled Zero Point Vibrational Energy (zpe) 11384.4 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 10752.6 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 MP2/6-31G(2df,p)
ABC
0.22736 0.20883 0.10885

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.261
C2 0.000 0.000 -1.261
N3 0.000 1.201 0.666
N4 0.000 -1.201 0.666
N5 0.000 -1.201 -0.666
N6 0.000 1.201 -0.666
H7 0.000 0.000 2.345
H8 0.000 0.000 -2.345

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52281.33991.33992.27102.27101.08343.6062
C22.52282.27102.27101.33991.33993.60621.0834
N31.33992.27102.40102.74611.33282.06363.2417
N41.33992.27102.40101.33282.74612.06363.2417
N52.27101.33992.74611.33282.40103.24172.0636
N62.27101.33991.33282.74612.40103.24172.0636
H71.08343.60622.06362.06363.24173.24174.6896
H83.60621.08343.24173.24172.06362.06364.6896

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 116.366 C1 N4 N5 116.366
C2 N5 N4 116.366 C2 N6 N3 116.366
N3 C1 N4 127.268 N3 C1 H7 116.366
N4 C1 H7 116.366 N5 C2 N6 127.268
N5 C2 H8 116.366 N6 C2 H8 116.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability