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

using model chemistry: CISD/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 CISD/6-31G
 hartrees
Energy at 0K-294.934287
Energy at 298.15K-294.939647
Nuclear repulsion energy210.409497
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 CISD/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 3375 3165 0.00      
2 Ag 1488 1395 0.00      
3 Ag 1055 989 0.00      
4 Ag 777 729 0.00      
5 Au 402 377 0.00      
6 B1u 3371 3161 1.02      
7 B1u 1257 1178 74.59      
8 B1u 1110 1041 1.10      
9 B2g 1020 957 0.00      
10 B2g 826 774 0.00      
11 B2u 1514 1420 17.36      
12 B2u 1148 1076 5.74      
13 B2u 789 740 51.04      
14 B3g 1595 1495 0.00      
15 B3g 1372 1287 0.00      
16 B3g 674 632 0.00      
17 B3u 971 910 3.04      
18 B3u 356 334 70.81      

Unscaled Zero Point Vibrational Energy (zpe) 11549.2 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 10830.8 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 CISD/6-31G
ABC
0.22036 0.20908 0.10728

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.291
C2 0.000 0.000 -1.291
N3 0.000 1.200 0.671
N4 0.000 -1.200 0.671
N5 0.000 -1.200 -0.671
N6 0.000 1.200 -0.671
H7 0.000 0.000 2.367
H8 0.000 0.000 -2.367

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.58231.35071.35072.29972.29971.07553.6578
C22.58232.29972.29971.35071.35073.65781.0755
N31.35072.29972.39962.74911.34152.07743.2658
N41.35072.29972.39961.34152.74912.07743.2658
N52.29971.35072.74911.34152.39963.26582.0774
N62.29971.35071.34152.74912.39963.26582.0774
H71.07553.65782.07742.07743.26583.26584.7333
H83.65781.07553.26583.26582.07742.07744.7333

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 117.342 C1 N4 N5 117.342
C2 N5 N4 117.342 C2 N6 N3 117.342
N3 C1 N4 125.315 N3 C1 H7 117.342
N4 C1 H7 117.342 N5 C2 N6 125.315
N5 C2 H8 117.342 N6 C2 H8 117.342
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability