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: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-296.204302
Energy at 298.15K-296.209460
Nuclear repulsion energy212.821787
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 B3PW91/6-31G*
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 3242 3101 0.00      
2 Ag 1507 1442 0.00      
3 Ag 1064 1018 0.00      
4 Ag 758 726 0.00      
5 Au 333 319 0.00      
6 B1u 3240 3100 10.07      
7 B1u 1246 1193 59.80      
8 B1u 1097 1050 1.98      
9 B2g 996 953 0.00      
10 B2g 827 791 0.00      
11 B2u 1492 1428 2.43      
12 B2u 1168 1117 10.13      
13 B2u 1025 981 35.56      
14 B3g 1588 1519 0.00      
15 B3g 1335 1277 0.00      
16 B3g 646 618 0.00      
17 B3u 927 887 1.11      
18 B3u 242 231 55.61      

Unscaled Zero Point Vibrational Energy (zpe) 11366.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 10874.0 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 B3PW91/6-31G*
ABC
0.22870 0.21115 0.10979

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.261
C2 0.000 0.000 -1.261
N3 0.000 1.194 0.660
N4 0.000 -1.194 0.660
N5 0.000 -1.194 -0.660
N6 0.000 1.194 -0.660
H7 0.000 0.000 2.348
H8 0.000 0.000 -2.348

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.52281.33671.33672.26232.26231.08623.6090
C22.52282.26232.26231.33671.33673.60901.0862
N31.33672.26232.38782.72861.32042.06703.2361
N41.33672.26232.38781.32042.72862.06703.2361
N52.26231.33672.72861.32042.38783.23612.0670
N62.26231.33671.32042.72862.38783.23612.0670
H71.08623.60902.06702.06703.23613.23614.6951
H83.60901.08623.23613.23612.06702.06704.6951

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 116.727 C1 N4 N5 116.727
C2 N5 N4 116.727 C2 N6 N3 116.727
N3 C1 N4 126.545 N3 C1 H7 116.727
N4 C1 H7 116.727 N5 C2 N6 126.545
N5 C2 H8 116.727 N6 C2 H8 116.727
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.175      
2 C 0.175      
3 N -0.200      
4 N -0.200      
5 N -0.200      
6 N -0.200      
7 H 0.225      
8 H 0.225      


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 -32.310 0.000 0.000
y 0.000 -43.250 0.000
z 0.000 0.000 -27.631
Traceless
 xyz
x 3.131 0.000 0.000
y 0.000 -13.280 0.000
z 0.000 0.000 10.149
Polar
3z2-r220.299
x2-y210.940
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.005 0.000 0.000
y 0.000 6.576 0.000
z 0.000 0.000 7.875


<r2> (average value of r2) Å2
<r2> 103.714
(<r2>)1/2 10.184