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

using model chemistry: CCD/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 CCD/6-31G**
 hartrees
Energy at 0K-295.503015
Energy at 298.15K-295.508309
Nuclear repulsion energy212.396399
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/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 3310 3104 0.00      
2 Ag 1538 1442 0.00      
3 Ag 1071 1004 0.00      
4 Ag 764 716 0.00      
5 Au 368 345 0.00      
6 B1u 3309 3103 7.68      
7 B1u 1268 1189 64.64      
8 B1u 1125 1054 1.88      
9 B2g 998 936 0.00      
10 B2g 809 759 0.00      
11 B2u 1525 1430 3.76      
12 B2u 1179 1105 8.64      
13 B2u 905 849 57.26      
14 B3g 1637 1535 0.00      
15 B3g 1363 1278 0.00      
16 B3g 654 613 0.00      
17 B3u 938 880 1.18      
18 B3u 317 298 52.06      

Unscaled Zero Point Vibrational Energy (zpe) 11539.0 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 10818.9 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/6-31G**
ABC
0.22783 0.21016 0.10932

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/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 1.197 0.662
N4 0.000 -1.197 0.662
N5 0.000 -1.197 -0.662
N6 0.000 1.197 -0.662
H7 0.000 0.000 2.344
H8 0.000 0.000 -2.344

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52821.33951.33952.26782.26781.07973.6079
C22.52822.26782.26781.33951.33953.60791.0797
N31.33952.26782.39342.73551.32462.06393.2355
N41.33952.26782.39341.32462.73552.06393.2355
N52.26781.33952.73551.32462.39343.23552.0639
N62.26781.33951.32462.73552.39343.23552.0639
H71.07973.60792.06392.06393.23553.23554.6876
H83.60791.07973.23553.23552.06392.06394.6876

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 116.698 C1 N4 N5 116.698
C2 N5 N4 116.698 C2 N6 N3 116.698
N3 C1 N4 126.605 N3 C1 H7 116.698
N4 C1 H7 116.698 N5 C2 N6 126.605
N5 C2 H8 116.698 N6 C2 H8 116.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability