All results from a given calculation for C4H4N2 (Pyrazine)
using model chemistry: CISD/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 CISD/3-21G*
| | hartrees |
| Energy at 0K | -261.690159 |
| Energy at 298.15K | -261.684959 |
| Nuclear repulsion energy | 207.799199 |
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/3-21G*
Geometric Data calculated at CISD/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 |
1.150 |
0.696 |
| C4 |
0.000 |
-1.150 |
0.696 |
| C5 |
0.000 |
-1.150 |
-0.696 |
| C6 |
0.000 |
1.150 |
-0.696 |
| H7 |
0.000 |
2.073 |
1.254 |
| H8 |
0.000 |
-2.073 |
1.254 |
| H9 |
0.000 |
-2.073 |
-1.254 |
| H10 |
0.000 |
2.073 |
-1.254 |
Atom - Atom Distances (Å)
| |
N1 |
N2 |
C3 |
C4 |
C5 |
C6 |
H7 |
H8 |
H9 |
H10 |
| N1 | | 2.8024 | 1.3489 | 1.3489 | 2.3914 | 2.3914 | 2.0783 | 2.0783 | 3.3684 | 3.3684 |
N2 | 2.8024 | | 2.3914 | 2.3914 | 1.3489 | 1.3489 | 3.3684 | 3.3684 | 2.0783 | 2.0783 | C3 | 1.3489 | 2.3914 | | 2.2995 | 2.6877 | 1.3915 | 1.0788 | 3.2708 | 3.7666 | 2.1571 | C4 | 1.3489 | 2.3914 | 2.2995 | | 1.3915 | 2.6877 | 3.2708 | 1.0788 | 2.1571 | 3.7666 | C5 | 2.3914 | 1.3489 | 2.6877 | 1.3915 | | 2.2995 | 3.7666 | 2.1571 | 1.0788 | 3.2708 | C6 | 2.3914 | 1.3489 | 1.3915 | 2.6877 | 2.2995 | | 2.1571 | 3.7666 | 3.2708 | 1.0788 | H7 | 2.0783 | 3.3684 | 1.0788 | 3.2708 | 3.7666 | 2.1571 | | 4.1461 | 4.8454 | 2.5075 | H8 | 2.0783 | 3.3684 | 3.2708 | 1.0788 | 2.1571 | 3.7666 | 4.1461 | | 2.5075 | 4.8454 | H9 | 3.3684 | 2.0783 | 3.7666 | 2.1571 | 1.0788 | 3.2708 | 4.8454 | 2.5075 | | 4.1461 | H10 | 3.3684 | 2.0783 | 2.1571 | 3.7666 | 3.2708 | 1.0788 | 2.5075 | 4.8454 | 4.1461 | |
More geometry information
Calculated Bond Angles
| atom1 |
atom2 |
atom3 |
angle |
|
atom1 |
atom2 |
atom3 |
angle |
| N1 |
C3 |
C6 |
121.532 |
|
N1 |
C3 |
H7 |
117.322 |
| N1 |
C4 |
C5 |
121.532 |
|
N1 |
C4 |
H8 |
117.322 |
| N2 |
C5 |
C4 |
121.532 |
|
N2 |
C5 |
H9 |
117.322 |
| N2 |
C6 |
C3 |
121.532 |
|
N2 |
C6 |
H10 |
117.322 |
| C3 |
N1 |
C4 |
116.937 |
|
C3 |
C6 |
H10 |
121.147 |
| C4 |
C5 |
H9 |
121.147 |
|
C5 |
N2 |
C6 |
116.937 |
| C5 |
C4 |
H8 |
121.147 |
|
C6 |
C3 |
H7 |
121.147 |
Electronic energy levels
Electronic state
Charges, Dipole, Quadrupole and Polarizability