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

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-50.756289
Energy at 298.15K-50.761860
Nuclear repulsion energy108.979502
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 HF/CEP-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 3458 3105 0.00      
2 Ag 1735 1558 0.00      
3 Ag 1163 1044 0.00      
4 Ag 808 726 0.00      
5 Au 440 395 0.00      
6 B1u 3453 3101 15.69      
7 B1u 1356 1218 73.73      
8 B1u 1171 1052 4.26      
9 B2g 1095 983 0.00      
10 B2g 883 793 0.00      
11 B2u 1631 1465 0.00      
12 B2u 1270 1140 27.31      
13 B2u 897 805 117.58      
14 B3g 1775 1594 0.00      
15 B3g 1433 1287 0.00      
16 B3g 692 622 0.00      
17 B3u 1027 922 2.53      
18 B3u 403 362 56.29      

Unscaled Zero Point Vibrational Energy (zpe) 12344.5 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 11085.3 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 HF/CEP-31G*
ABC
0.23161 0.21496 0.11149

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.259
C2 0.000 0.000 -1.259
N3 0.000 1.183 0.651
N4 0.000 -1.183 0.651
N5 0.000 -1.183 -0.651
N6 0.000 1.183 -0.651
H7 0.000 0.000 2.336
H8 0.000 0.000 -2.336

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.51791.33021.33022.24692.24691.07703.5948
C22.51792.24692.24691.33021.33023.59481.0770
N31.33022.24692.36652.70111.30232.05883.2129
N41.33022.24692.36651.30232.70112.05883.2129
N52.24691.33022.70111.30232.36653.21292.0588
N62.24691.33021.30232.70112.36653.21292.0588
H71.07703.59482.05882.05883.21293.21294.6718
H83.59481.07703.21293.21292.05882.05884.6718

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 117.188 C1 N4 N5 117.188
C2 N5 N4 117.188 C2 N6 N3 117.188
N3 C1 N4 125.623 N3 C1 H7 117.188
N4 C1 H7 117.188 N5 C2 N6 125.623
N5 C2 H8 117.188 N6 C2 H8 117.188
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.433      
2 C -0.433      
3 N 0.091      
4 N 0.091      
5 N 0.091      
6 N 0.091      
7 H 0.251      
8 H 0.251      


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 -32.959 0.000 0.000
y 0.000 -44.773 0.000
z 0.000 0.000 -27.953
Traceless
 xyz
x 3.404 0.000 0.000
y 0.000 -14.317 0.000
z 0.000 0.000 10.913
Polar
3z2-r221.825
x2-y211.814
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.567 0.000 0.000
y 0.000 6.712 0.000
z 0.000 0.000 7.556


<r2> (average value of r2) Å2
<r2> 82.076
(<r2>)1/2 9.060