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

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-294.523073
Energy at 298.15K-294.528096
Nuclear repulsion energy208.805382
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 B3PW91/3-21G
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 3250 3124 0.00      
2 Ag 1328 1276 0.00      
3 Ag 957 920 0.00      
4 Ag 747 718 0.00      
5 Au 317 305 0.00      
6 B1u 3248 3122 4.65      
7 B1u 1175 1129 57.61      
8 B1u 1042 1002 4.96      
9 B2g 1025 986 0.00      
10 B2g 820 788 0.00      
11 B2u 1431 1375 22.69      
12 B2u 1078 1036 0.72      
13 B2u 759 730 17.57      
14 B3g 1448 1391 0.00      
15 B3g 1323 1272 0.00      
16 B3g 628 604 0.00      
17 B3u 963 926 5.63      
18 B3u 237 228 65.77      

Unscaled Zero Point Vibrational Energy (zpe) 10887.6 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 10465.2 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 B3PW91/3-21G
ABC
0.21764 0.20543 0.10568

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.286
C2 0.000 0.000 -1.286
N3 0.000 1.210 0.687
N4 0.000 -1.210 0.687
N5 0.000 -1.210 -0.687
N6 0.000 1.210 -0.687
H7 0.000 0.000 2.368
H8 0.000 0.000 -2.368

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.57281.35071.35072.31512.31511.08123.6540
C22.57282.31512.31511.35071.35073.65401.0812
N31.35072.31512.42082.78361.37412.07113.2858
N41.35072.31512.42081.37412.78362.07113.2858
N52.31511.35072.78361.37412.42083.28582.0711
N62.31511.35071.37412.78362.42083.28582.0711
H71.08123.65402.07112.07113.28583.28584.7353
H83.65401.08123.28583.28582.07112.07114.7353

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 116.342 C1 N4 N5 116.342
C2 N5 N4 116.342 C2 N6 N3 116.342
N3 C1 N4 127.315 N3 C1 H7 116.342
N4 C1 H7 116.342 N5 C2 N6 127.315
N5 C2 H8 116.342 N6 C2 H8 116.342
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.198      
2 C 0.198      
3 N -0.251      
4 N -0.251      
5 N -0.251      
6 N -0.251      
7 H 0.304      
8 H 0.304      


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 -32.965 0.000 0.000
y 0.000 -45.082 0.000
z 0.000 0.000 -27.905
Traceless
 xyz
x 3.529 0.000 0.000
y 0.000 -14.647 0.000
z 0.000 0.000 11.118
Polar
3z2-r222.236
x2-y212.117
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.468 0.000 0.000
y 0.000 5.860 0.000
z 0.000 0.000 7.579


<r2> (average value of r2) Å2
<r2> 107.367
(<r2>)1/2 10.362