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

using model chemistry: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-291.219006
Energy at 298.15K-291.223501
Nuclear repulsion energy200.999463
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=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3494 3106 0.00      
2 Ag 1327 1180 0.00      
3 Ag 929 826 0.00      
4 Ag 706 628 0.00      
5 Au 299 266 0.00      
6 B1u 3496 3108 15.49      
7 B1u 1167 1037 43.87      
8 B1u 1080 960 13.87      
9 B2g 980 871 0.00      
10 B2g 791 703 0.00      
11 B2u 1465 1302 29.51      
12 B2u 1042 926 4.77      
13 B2u 516 459 26.02      
14 B3g 1489 1323 0.00      
15 B3g 1297 1153 0.00      
16 B3g 622 553 0.00      
17 B3u 902 802 0.05      
18 B3u 276 246 26.03      

Unscaled Zero Point Vibrational Energy (zpe) 10939.1 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 9723.8 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=FULL/STO-3G
ABC
0.20811 0.18442 0.09777

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.301
C2 0.000 0.000 -1.301
N3 0.000 1.277 0.715
N4 0.000 -1.277 0.715
N5 0.000 -1.277 -0.715
N6 0.000 1.277 -0.715
H7 0.000 0.000 2.409
H8 0.000 0.000 -2.409

Atom - Atom Distances (Å)
  C1 C2 N3 N4 N5 N6 H7 H8
C12.60281.40551.40552.38732.38731.10713.7099
C22.60282.38732.38731.40551.40553.70991.1071
N31.40552.38732.55502.92831.43072.12103.3750
N41.40552.38732.55501.43072.92832.12103.3750
N52.38731.40552.92831.43072.55503.37502.1210
N62.38731.40551.43072.92832.55503.37502.1210
H71.10713.70992.12102.12103.37503.37504.8171
H83.70991.10713.37503.37502.12102.12104.8171

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 114.642 C1 N4 N5 114.642
C2 N5 N4 114.642 C2 N6 N3 114.642
N3 C1 N4 130.715 N3 C1 H7 114.642
N4 C1 H7 114.642 N5 C2 N6 130.715
N5 C2 H8 114.642 N6 C2 H8 114.642
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability