return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-296.260408
Energy at 298.15K-296.265280
Nuclear repulsion energy209.700602
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 BLYP/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 3126 3102 0.00      
2 Ag 1364 1353 0.00      
3 Ag 984 977 0.00      
4 Ag 729 723 0.00      
5 Au 291 289 0.00      
6 B1u 3125 3101 15.27      
7 B1u 1168 1159 53.90      
8 B1u 1055 1047 0.28      
9 B2g 957 950 0.00      
10 B2g 790 784 0.00      
11 B2u 1422 1411 3.42      
12 B2u 1099 1091 7.30      
13 B2u 910 903 24.16      
14 B3g 1473 1462 0.00      
15 B3g 1282 1272 0.00      
16 B3g 626 621 0.00      
17 B3u 888 881 0.49      
18 B3u 158 157 51.24      

Unscaled Zero Point Vibrational Energy (zpe) 10723.4 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 10640.8 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 BLYP/6-31G**
ABC
0.22237 0.20467 0.10658

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.276
C2 0.000 0.000 -1.276
N3 0.000 1.213 0.674
N4 0.000 -1.213 0.674
N5 0.000 -1.213 -0.674
N6 0.000 1.213 -0.674
H7 0.000 0.000 2.369
H8 0.000 0.000 -2.369

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.55141.35381.35382.29602.29601.09363.6450
C22.55142.29602.29601.35381.35383.64501.0936
N31.35382.29602.42532.77461.34782.08453.2759
N41.35382.29602.42531.34782.77462.08453.2759
N52.29601.35382.77461.34782.42533.27592.0845
N62.29601.35381.34782.77462.42533.27592.0845
H71.09363.64502.08452.08453.27593.27594.7386
H83.64501.09363.27593.27592.08452.08454.7386

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 116.395 C1 N4 N5 116.395
C2 N5 N4 116.395 C2 N6 N3 116.395
N3 C1 N4 127.210 N3 C1 H7 116.395
N4 C1 H7 116.395 N5 C2 N6 127.210
N5 C2 H8 116.395 N6 C2 H8 116.395
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.254      
2 C 0.254      
3 N -0.193      
4 N -0.193      
5 N -0.193      
6 N -0.193      
7 H 0.132      
8 H 0.132      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.312 0.000 0.000
y 0.000 -43.179 0.000
z 0.000 0.000 -28.154
Traceless
 xyz
x 3.354 0.000 0.000
y 0.000 -12.946 0.000
z 0.000 0.000 9.591
Polar
3z2-r219.183
x2-y210.867
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.034 0.000 0.000
y 0.000 6.758 0.000
z 0.000 0.000 8.295


<r2> (average value of r2) Å2
<r2> 106.224
(<r2>)1/2 10.307