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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-261.686603
Energy at 298.15K-261.681417
Nuclear repulsion energy207.893246
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 CID/3-21G
Rotational Constants (cm-1) from geometry optimized at CID/3-21G
ABC
0.20890 0.19954 0.10206

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.401
N2 0.000 0.000 -1.401
C3 0.000 1.149 0.695
C4 0.000 -1.149 0.695
C5 0.000 -1.149 -0.695
C6 0.000 1.149 -0.695
H7 0.000 2.072 1.253
H8 0.000 -2.072 1.253
H9 0.000 -2.072 -1.253
H10 0.000 2.072 -1.253

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.80101.34821.34822.39032.39032.07762.07763.36723.3672
N22.80102.39032.39031.34821.34823.36723.36722.07762.0776
C31.34822.39032.29832.68641.39101.07873.26943.76512.1565
C41.34822.39032.29831.39102.68643.26941.07872.15653.7651
C52.39031.34822.68641.39102.29833.76512.15651.07873.2694
C62.39031.34821.39102.68642.29832.15653.76513.26941.0787
H72.07763.36721.07873.26943.76512.15654.14474.84382.5067
H82.07763.36723.26941.07872.15653.76514.14472.50674.8438
H93.36722.07763.76512.15651.07873.26944.84382.50674.1447
H103.36722.07762.15653.76513.26941.07872.50674.84384.1447

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.530 N1 C3 H7 117.327
N1 C4 C5 121.530 N1 C4 H8 117.327
N2 C5 C4 121.530 N2 C5 H9 117.327
N2 C6 C3 121.530 N2 C6 H10 117.327
C3 N1 C4 116.940 C3 C6 H10 121.143
C4 C5 H9 121.143 C5 N2 C6 116.940
C5 C4 H8 121.143 C6 C3 H7 121.143
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability