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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-295.485329
Energy at 298.15K-295.490609
Nuclear repulsion energy212.468288
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 MP3/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3296 3094 0.00      
2 Ag 1543 1448 0.00      
3 Ag 1078 1012 0.00      
4 Ag 767 720 0.00      
5 Au 368 345 0.00      
6 B1u 3295 3093 4.59      
7 B1u 1275 1197 67.51      
8 B1u 1125 1056 2.15      
9 B2g 993 932 0.00      
10 B2g 810 760 0.00      
11 B2u 1529 1435 5.20      
12 B2u 1184 1111 11.00      
13 B2u 879 825 63.40      
14 B3g 1642 1541 0.00      
15 B3g 1364 1280 0.00      
16 B3g 658 617 0.00      
17 B3u 935 878 2.02      
18 B3u 318 299 54.48      

Unscaled Zero Point Vibrational Energy (zpe) 11529.3 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 10821.4 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 MP3/6-31G*
ABC
0.22774 0.21058 0.10941

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.264
C2 0.000 0.000 -1.264
N3 0.000 1.195 0.662
N4 0.000 -1.195 0.662
N5 0.000 -1.195 -0.662
N6 0.000 1.195 -0.662
H7 0.000 0.000 2.348
H8 0.000 0.000 -2.348

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52861.33861.33862.26712.26711.08373.6122
C22.52862.26712.26711.33861.33863.61221.0837
N31.33862.26712.39102.73311.32402.06683.2387
N41.33862.26712.39101.32402.73312.06683.2387
N52.26711.33862.73311.32402.39103.23872.0668
N62.26711.33861.32402.73312.39103.23872.0668
H71.08373.61222.06682.06683.23873.23874.6959
H83.61221.08373.23873.23872.06682.06684.6959

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 116.739 C1 N4 N5 116.739
C2 N5 N4 116.739 C2 N6 N3 116.739
N3 C1 N4 126.523 N3 C1 H7 116.739
N4 C1 H7 116.739 N5 C2 N6 126.523
N5 C2 H8 116.739 N6 C2 H8 116.739
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability