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

using model chemistry: PBEPBE/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 PBEPBE/3-21G*
 hartrees
Energy at 0K-294.321935
Energy at 298.15K-294.326415
Nuclear repulsion energy206.181293
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 PBEPBE/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 3149 3002 0.00      
2 Ag 1237 1179 0.00      
3 Ag 895 853 0.00      
4 Ag 715 682 0.00      
5 Au 253 241 0.00      
6 B1u 3147 3001 8.61      
7 B1u 1118 1066 44.18      
8 B1u 997 951 8.61      
9 B2g 982 936 0.00      
10 B2g 787 751 0.00      
11 B2u 1380 1316 22.73      
12 B2u 1025 977 0.10      
13 B2u 699 667 10.71      
14 B3g 1373 1309 0.00      
15 B3g 1262 1203 0.00      
16 B3g 603 575 0.00      
17 B3u 918 875 6.08      
18 B3u 43 41 61.65      

Unscaled Zero Point Vibrational Energy (zpe) 10290.5 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 9812.0 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 PBEPBE/3-21G*
ABC
0.21339 0.19917 0.10302

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.293
C2 0.000 0.000 -1.293
N3 0.000 1.229 0.700
N4 0.000 -1.229 0.700
N5 0.000 -1.229 -0.700
N6 0.000 1.229 -0.700
H7 0.000 0.000 2.384
H8 0.000 0.000 -2.384

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.58521.36471.36472.34132.34131.09123.6764
C22.58522.34132.34131.36471.36473.67641.0912
N31.36472.34132.45852.82921.40002.08483.3198
N41.36472.34132.45851.40002.82922.08483.3198
N52.34131.36472.82921.40002.45853.31982.0848
N62.34131.36471.40002.82922.45853.31982.0848
H71.09123.67642.08482.08483.31983.31984.7676
H83.67641.09123.31983.31982.08482.08484.7676

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 115.737 C1 N4 N5 115.737
C2 N5 N4 115.737 C2 N6 N3 115.737
N3 C1 N4 128.526 N3 C1 H7 115.737
N4 C1 H7 115.737 N5 C2 N6 128.526
N5 C2 H8 115.737 N6 C2 H8 115.737
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.174      
2 C 0.174      
3 N -0.229      
4 N -0.229      
5 N -0.229      
6 N -0.229      
7 H 0.284      
8 H 0.284      


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 -33.053 0.000 0.000
y 0.000 -44.627 0.000
z 0.000 0.000 -28.151
Traceless
 xyz
x 3.337 0.000 0.000
y 0.000 -14.026 0.000
z 0.000 0.000 10.689
Polar
3z2-r221.378
x2-y211.575
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.496 0.000 0.000
y 0.000 6.106 0.000
z 0.000 0.000 7.935


<r2> (average value of r2) Å2
<r2> 109.479
(<r2>)1/2 10.463