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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-295.498197
Energy at 298.15K-295.503366
Nuclear repulsion energy211.869264
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/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 3261 3105 0.00      
2 Ag 1516 1444 0.00      
3 Ag 1056 1006 0.00      
4 Ag 758 722 0.00      
5 Au 344 328 0.00      
6 B1u 3259 3104 7.19      
7 B1u 1253 1193 62.49      
8 B1u 1109 1056 2.01      
9 B2g 984 937 0.00      
10 B2g 806 768 0.00      
11 B2u 1506 1434 5.41      
12 B2u 1163 1107 9.76      
13 B2u 842 802 64.49      
14 B3g 1612 1535 0.00      
15 B3g 1349 1285 0.00      
16 B3g 651 620 0.00      
17 B3u 924 880 2.06      
18 B3u 277 264 55.44      

Unscaled Zero Point Vibrational Energy (zpe) 11334.9 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 10794.2 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/6-31G*
ABC
0.22669 0.20919 0.10879

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.267
C2 0.000 0.000 -1.267
N3 0.000 1.199 0.664
N4 0.000 -1.199 0.664
N5 0.000 -1.199 -0.664
N6 0.000 1.199 -0.664
H7 0.000 0.000 2.353
H8 0.000 0.000 -2.353

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.53331.34231.34232.27302.27301.08623.6195
C22.53332.27302.27301.34231.34233.61951.0862
N31.34232.27302.39892.74211.32812.07143.2466
N41.34232.27302.39891.32812.74212.07143.2466
N52.27301.34232.74211.32812.39893.24662.0714
N62.27301.34231.32812.74212.39893.24662.0714
H71.08623.61952.07142.07143.24663.24664.7057
H83.61951.08623.24663.24662.07142.07144.7057

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 116.674 C1 N4 N5 116.674
C2 N5 N4 116.674 C2 N6 N3 116.674
N3 C1 N4 126.652 N3 C1 H7 116.674
N4 C1 H7 116.674 N5 C2 N6 126.652
N5 C2 H8 116.674 N6 C2 H8 116.674
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability