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: MP2/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2/cc-pVDZ
 hartrees
Energy at 0K-295.513190
Energy at 298.15K-295.518407
Nuclear repulsion energy210.655908
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 MP2/cc-pVDZ
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 3260 3105 0.00      
2 Ag 1435 1367 0.00      
3 Ag 1014 965 0.00      
4 Ag 744 709 0.00      
5 Au 337 321 0.00      
6 B1u 3259 3104 5.41      
7 B1u 1219 1161 62.40      
8 B1u 1108 1055 0.51      
9 B2g 994 947 0.00      
10 B2g 814 776 0.00      
11 B2u 1461 1392 5.29      
12 B2u 1226 1168 0.39      
13 B2u 1081 1030 26.79      
14 B3g 1554 1480 0.00      
15 B3g 1316 1254 0.00      
16 B3g 633 603 0.00      
17 B3u 928 884 1.46      
18 B3u 274 261 51.91      

Unscaled Zero Point Vibrational Energy (zpe) 11328.2 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 10790.1 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 MP2/cc-pVDZ
ABC
0.22534 0.20574 0.10755

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.266
C2 0.000 0.000 -1.266
N3 0.000 1.209 0.670
N4 0.000 -1.209 0.670
N5 0.000 -1.209 -0.670
N6 0.000 1.209 -0.670
H7 0.000 0.000 2.360
H8 0.000 0.000 -2.360

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.53211.34861.34862.28242.28241.09423.6263
C22.53212.28242.28241.34861.34863.62631.0942
N31.34862.28242.41902.76491.33912.07883.2623
N41.34862.28242.41901.33912.76492.07883.2623
N52.28241.34862.76491.33912.41903.26232.0788
N62.28241.34861.33912.76492.41903.26232.0788
H71.09423.62632.07882.07883.26233.26234.7205
H83.62631.09423.26233.26232.07882.07884.7205

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 116.252 C1 N4 N5 116.252
C2 N5 N4 116.252 C2 N6 N3 116.252
N3 C1 N4 127.495 N3 C1 H7 116.252
N4 C1 H7 116.252 N5 C2 N6 127.495
N5 C2 H8 116.252 N6 C2 H8 116.252
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability