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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: CID/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 CID/cc-pVDZ
 hartrees
Energy at 0K-263.403303
Energy at 298.15K-263.398095
Nuclear repulsion energy209.296589
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/cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at CID/cc-pVDZ
ABC
0.21627 0.19827 0.10344

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.406
N2 0.000 0.000 -1.406
C3 0.000 1.126 0.697
C4 0.000 -1.126 0.697
C5 0.000 -1.126 -0.697
C6 0.000 1.126 -0.697
H7 0.000 2.062 1.251
H8 0.000 -2.062 1.251
H9 0.000 -2.062 -1.251
H10 0.000 2.062 -1.251

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.81291.33051.33052.38572.38572.06772.06773.36343.3634
N22.81292.38572.38571.33051.33053.36343.36342.06772.0677
C31.33052.38572.25112.64781.39401.08783.23523.73552.1612
C41.33052.38572.25111.39402.64783.23521.08782.16123.7355
C52.38571.33052.64781.39402.25113.73552.16121.08783.2352
C62.38571.33051.39402.64782.25112.16123.73553.23521.0878
H72.06773.36341.08783.23523.73552.16124.12374.82322.5017
H82.06773.36343.23521.08782.16123.73554.12372.50174.8232
H93.36342.06773.73552.16121.08783.23524.82322.50174.1237
H103.36342.06772.16123.73553.23521.08782.50174.82324.1237

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 122.222 N1 C3 H7 117.174
N1 C4 C5 122.222 N1 C4 H8 117.174
N2 C5 C4 122.222 N2 C5 H9 117.174
N2 C6 C3 122.222 N2 C6 H10 117.174
C3 N1 C4 115.556 C3 C6 H10 120.605
C4 C5 H9 120.605 C5 N2 C6 115.556
C5 C4 H8 120.605 C6 C3 H7 120.605
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability