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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: CID/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 CID/6-31+G**
 hartrees
Energy at 0K-263.411036
Energy at 298.15K-263.405807
Nuclear repulsion energy210.038230
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/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CID/6-31+G**
ABC
0.21678 0.20039 0.10413

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/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 0.695
C4 0.000 -1.126 0.695
C5 0.000 -1.126 -0.695
C6 0.000 1.126 -0.695
H7 0.000 2.049 1.246
H8 0.000 -2.049 1.246
H9 0.000 -2.049 -1.246
H10 0.000 2.049 -1.246

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.79551.32731.32732.37592.37592.05512.05513.34503.3450
N22.79552.37592.37591.32731.32733.34503.34502.05512.0551
C31.32732.37592.25152.64551.38901.07583.22273.72122.1490
C41.32732.37592.25151.38902.64553.22271.07582.14903.7212
C52.37591.32732.64551.38902.25153.72122.14901.07583.2227
C62.37591.32731.38902.64552.25152.14903.72123.22271.0758
H72.05513.34501.07583.22273.72122.14904.09904.79692.4917
H82.05513.34503.22271.07582.14903.72124.09902.49174.7969
H93.34502.05513.72122.14901.07583.22274.79692.49174.0990
H103.34502.05512.14903.72123.22271.07582.49174.79694.0990

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.991 N1 C3 H7 117.178
N1 C4 C5 121.991 N1 C4 H8 117.178
N2 C5 C4 121.991 N2 C5 H9 117.178
N2 C6 C3 121.991 N2 C6 H10 117.178
C3 N1 C4 116.017 C3 C6 H10 120.831
C4 C5 H9 120.831 C5 N2 C6 116.017
C5 C4 H8 120.831 C6 C3 H7 120.831
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability