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/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-296.363048
Energy at 298.15K-296.367987
Nuclear repulsion energy210.888521
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/cc-pVTZ
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 3109 3100 0.00      
2 Ag 1359 1355 0.00      
3 Ag 985 982 0.00      
4 Ag 728 726 0.00      
5 Au 307 306 0.00      
6 B1u 3108 3098 12.87      
7 B1u 1173 1170 57.00      
8 B1u 1061 1058 0.02      
9 B2g 972 969 0.00      
10 B2g 806 803 0.00      
11 B2u 1419 1414 3.41      
12 B2u 1096 1093 7.15      
13 B2u 891 888 25.94      
14 B3g 1467 1462 0.00      
15 B3g 1282 1278 0.00      
16 B3g 634 632 0.00      
17 B3u 901 898 1.38      
18 B3u 165 165 53.49      

Unscaled Zero Point Vibrational Energy (zpe) 10730.8 cm-1
Scaled (by 0.997) Zero Point Vibrational Energy (zpe) 10698.6 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/cc-pVTZ
ABC
0.22437 0.20747 0.10780

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.271
C2 0.000 0.000 -1.271
N3 0.000 1.204 0.670
N4 0.000 -1.204 0.670
N5 0.000 -1.204 -0.670
N6 0.000 1.204 -0.670
H7 0.000 0.000 2.360
H8 0.000 0.000 -2.360

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.54271.34641.34642.28422.28421.08883.6315
C22.54272.28422.28421.34641.34643.63151.0888
N31.34642.28422.40882.75611.33922.07573.2603
N41.34642.28422.40881.33922.75612.07573.2603
N52.28421.34642.75611.33922.40883.26032.0757
N62.28421.34641.33922.75612.40883.26032.0757
H71.08883.63152.07572.07573.26033.26034.7203
H83.63151.08883.26033.26032.07572.07574.7203

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 116.548 C1 N4 N5 116.548
C2 N5 N4 116.548 C2 N6 N3 116.548
N3 C1 N4 126.905 N3 C1 H7 116.548
N4 C1 H7 116.548 N5 C2 N6 126.905
N5 C2 H8 116.548 N6 C2 H8 116.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.025      
2 C 0.025      
3 N -0.076      
4 N -0.076      
5 N -0.076      
6 N -0.076      
7 H 0.127      
8 H 0.127      


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 -32.732 0.000 0.000
y 0.000 -43.849 0.000
z 0.000 0.000 -28.549
Traceless
 xyz
x 3.467 0.000 0.000
y 0.000 -13.208 0.000
z 0.000 0.000 9.742
Polar
3z2-r219.483
x2-y211.117
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.064 0.000 0.000
y 0.000 7.483 0.000
z 0.000 0.000 8.912


<r2> (average value of r2) Å2
<r2> 105.594
(<r2>)1/2 10.276