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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: CISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at CISD/6-31+G**
 hartrees
Energy at 0K-263.414129
Energy at 298.15K-263.408888
Nuclear repulsion energy209.975575
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 CISD/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CISD/6-31+G**
ABC
0.21655 0.20036 0.10407

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.398
N2 0.000 0.000 -1.398
C3 0.000 1.126 0.694
C4 0.000 -1.126 0.694
C5 0.000 -1.126 -0.694
C6 0.000 1.126 -0.694
H7 0.000 2.050 1.246
H8 0.000 -2.050 1.246
H9 0.000 -2.050 -1.246
H10 0.000 2.050 -1.246

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.79581.32801.32802.37632.37632.05602.05603.34563.3456
N22.79582.37632.37631.32801.32803.34563.34562.05602.0560
C31.32802.37632.25272.64651.38901.07593.22423.72242.1490
C41.32802.37632.25271.38902.64653.22421.07592.14903.7224
C52.37631.32802.64651.38902.25273.72242.14901.07593.2242
C62.37631.32801.38902.64652.25272.14903.72243.22421.0759
H72.05603.34561.07593.22423.72242.14904.10074.79832.4915
H82.05603.34563.22421.07592.14903.72244.10072.49154.7983
H93.34562.05603.72242.14901.07593.22424.79832.49154.1007
H103.34562.05602.14903.72243.22421.07592.49154.79834.1007

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.984 N1 C3 H7 117.195
N1 C4 C5 121.984 N1 C4 H8 117.195
N2 C5 C4 121.984 N2 C5 H9 117.195
N2 C6 C3 121.984 N2 C6 H10 117.195
C3 N1 C4 116.031 C3 C6 H10 120.821
C4 C5 H9 120.821 C5 N2 C6 116.031
C5 C4 H8 120.821 C6 C3 H7 120.821
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability