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

using model chemistry: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-294.639903
Energy at 298.15K-294.644932
Nuclear repulsion energy208.458468
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 B3LYP/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 3240 3126 0.00      
2 Ag 1312 1266 0.00      
3 Ag 943 910 0.00      
4 Ag 746 720 0.00      
5 Au 324 313 0.00      
6 B1u 3238 3124 6.21      
7 B1u 1169 1128 56.38      
8 B1u 1040 1003 5.35      
9 B2g 1022 986 0.00      
10 B2g 816 787 0.00      
11 B2u 1432 1382 20.33      
12 B2u 1065 1028 0.71      
13 B2u 726 701 16.50      
14 B3g 1439 1388 0.00      
15 B3g 1319 1273 0.00      
16 B3g 631 609 0.00      
17 B3u 960 926 4.09      
18 B3u 251 242 62.11      

Unscaled Zero Point Vibrational Energy (zpe) 10836.7 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 10456.3 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 B3LYP/3-21G
ABC
0.21661 0.20500 0.10532

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.289
C2 0.000 0.000 -1.289
N3 0.000 1.212 0.689
N4 0.000 -1.212 0.689
N5 0.000 -1.212 -0.689
N6 0.000 1.212 -0.689
H7 0.000 0.000 2.370
H8 0.000 0.000 -2.370

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.57861.35211.35212.32012.32011.08073.6592
C22.57862.32012.32011.35211.35213.65921.0807
N31.35212.32012.42332.78791.37852.07193.2904
N41.35212.32012.42331.37852.78792.07193.2904
N52.32011.35212.78791.37852.42333.29042.0719
N62.32011.35211.37852.78792.42333.29042.0719
H71.08073.65922.07192.07193.29043.29044.7399
H83.65921.08073.29043.29042.07192.07194.7399

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 116.346 C1 N4 N5 116.346
C2 N5 N4 116.346 C2 N6 N3 116.346
N3 C1 N4 127.308 N3 C1 H7 116.346
N4 C1 H7 116.346 N5 C2 N6 127.308
N5 C2 H8 116.346 N6 C2 H8 116.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.215      
2 C 0.215      
3 N -0.246      
4 N -0.246      
5 N -0.246      
6 N -0.246      
7 H 0.277      
8 H 0.277      


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 -32.846 0.000 0.000
y 0.000 -44.956 0.000
z 0.000 0.000 -28.181
Traceless
 xyz
x 3.722 0.000 0.000
y 0.000 -14.442 0.000
z 0.000 0.000 10.720
Polar
3z2-r221.440
x2-y212.109
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.453 0.000 0.000
y 0.000 5.843 0.000
z 0.000 0.000 7.618


<r2> (average value of r2) Å2
<r2> 107.653
(<r2>)1/2 10.376