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

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-295.527453
Energy at 298.15K-295.532661
Nuclear repulsion energy211.536298
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 QCISD/cc-pVDZ
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 3255 3123 0.00      
2 Ag 1512 1450 0.00      
3 Ag 1055 1012 0.00      
4 Ag 755 724 0.00      
5 Au 342 328 0.00      
6 B1u 3254 3122 6.86      
7 B1u 1242 1192 59.58      
8 B1u 1109 1064 3.47      
9 B2g 998 957 0.00      
10 B2g 818 785 0.00      
11 B2u 1491 1430 3.89      
12 B2u 1158 1111 9.03      
13 B2u 843 809 63.35      
14 B3g 1609 1544 0.00      
15 B3g 1329 1275 0.00      
16 B3g 646 620 0.00      
17 B3u 931 894 1.87      
18 B3u 284 273 50.47      

Unscaled Zero Point Vibrational Energy (zpe) 11314.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 10855.2 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 QCISD/cc-pVDZ
ABC
0.22713 0.20754 0.10845

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

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 1.204 0.663
N4 0.000 -1.204 0.663
N5 0.000 -1.204 -0.663
N6 0.000 1.204 -0.663
H7 0.000 0.000 2.358
H8 0.000 0.000 -2.358

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52851.34581.34582.27292.27291.09413.6226
C22.52852.27292.27291.34581.34583.62261.0941
N31.34582.27292.40852.74971.32682.07923.2528
N41.34582.27292.40851.32682.74972.07923.2528
N52.27291.34582.74971.32682.40853.25282.0792
N62.27291.34581.32682.74972.40853.25282.0792
H71.09413.62262.07922.07923.25283.25284.7167
H83.62261.09413.25283.25282.07922.07924.7167

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 116.518 C1 N4 N5 116.518
C2 N5 N4 116.518 C2 N6 N3 116.518
N3 C1 N4 126.964 N3 C1 H7 116.518
N4 C1 H7 116.518 N5 C2 N6 126.964
N5 C2 H8 116.518 N6 C2 H8 116.518
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability