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

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-295.485559
Energy at 298.15K-295.490734
HF Energy-294.583365
Nuclear repulsion energy211.001378
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*
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 3276 3089 0.00      
2 Ag 1442 1360 0.00      
3 Ag 1015 957 0.00      
4 Ag 749 706 0.00      
5 Au 338 319 0.00      
6 B1u 3275 3089 4.52      
7 B1u 1231 1161 64.42      
8 B1u 1107 1043 0.06      
9 B2g 980 924 0.00      
10 B2g 799 753 0.00      
11 B2u 1483 1399 6.91      
12 B2u 1226 1156 0.39      
13 B2u 1079 1018 29.56      
14 B3g 1560 1471 0.00      
15 B3g 1342 1265 0.00      
16 B3g 639 602 0.00      
17 B3u 921 868 1.47      
18 B3u 265 250 57.51      

Unscaled Zero Point Vibrational Energy (zpe) 11362.3 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 10714.7 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 MP2/6-31G*
ABC
0.22480 0.20751 0.10790

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.273
C2 0.000 0.000 -1.273
N3 0.000 1.204 0.659
N4 0.000 -1.204 0.659
N5 0.000 -1.204 -0.659
N6 0.000 1.204 -0.659
H7 0.000 0.000 2.355
H8 0.000 0.000 -2.355

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.54681.35161.35162.27642.27641.08203.6288
C22.54682.27642.27641.35161.35163.62881.0820
N31.35162.27642.40742.74431.31742.08033.2455
N41.35162.27642.40741.31742.74432.08033.2455
N52.27641.35162.74431.31742.40743.24552.0803
N62.27641.35161.31742.74432.40743.24552.0803
H71.08203.62882.08032.08033.24553.24554.7108
H83.62881.08203.24553.24552.08032.08034.7108

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 117.052 C1 N4 N5 117.052
C2 N5 N4 117.052 C2 N6 N3 117.052
N3 C1 N4 125.896 N3 C1 H7 117.052
N4 C1 H7 117.052 N5 C2 N6 125.896
N5 C2 H8 117.052 N6 C2 H8 117.052
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability