All results from a given calculation for C4H4N2 (Pyrazine)
using model chemistry: CISD/6-31G**
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/6-31G**
| | hartrees |
| Energy at 0K | -263.402371 |
| Energy at 298.15K | -263.397166 |
| Nuclear repulsion energy | 210.109082 |
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/6-31G**
Geometric Data calculated at CISD/6-31G**
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 |
1.125 |
0.694 |
| C4 |
0.000 |
-1.125 |
0.694 |
| C5 |
0.000 |
-1.125 |
-0.694 |
| C6 |
0.000 |
1.125 |
-0.694 |
| H7 |
0.000 |
2.050 |
1.245 |
| H8 |
0.000 |
-2.050 |
1.245 |
| H9 |
0.000 |
-2.050 |
-1.245 |
| H10 |
0.000 |
2.050 |
-1.245 |
Atom - Atom Distances (Å)
| |
N1 |
N2 |
C3 |
C4 |
C5 |
C6 |
H7 |
H8 |
H9 |
H10 |
| N1 | | 2.7955 | 1.3272 | 1.3272 | 2.3749 | 2.3749 | 2.0552 | 2.0552 | 3.3443 | 3.3443 |
N2 | 2.7955 | | 2.3749 | 2.3749 | 1.3272 | 1.3272 | 3.3443 | 3.3443 | 2.0552 | 2.0552 | C3 | 1.3272 | 2.3749 | | 2.2502 | 2.6437 | 1.3876 | 1.0763 | 3.2221 | 3.7199 | 2.1479 | C4 | 1.3272 | 2.3749 | 2.2502 | | 1.3876 | 2.6437 | 3.2221 | 1.0763 | 2.1479 | 3.7199 | C5 | 2.3749 | 1.3272 | 2.6437 | 1.3876 | | 2.2502 | 3.7199 | 2.1479 | 1.0763 | 3.2221 | C6 | 2.3749 | 1.3272 | 1.3876 | 2.6437 | 2.2502 | | 2.1479 | 3.7199 | 3.2221 | 1.0763 | H7 | 2.0552 | 3.3443 | 1.0763 | 3.2221 | 3.7199 | 2.1479 | | 4.0991 | 4.7961 | 2.4900 | H8 | 2.0552 | 3.3443 | 3.2221 | 1.0763 | 2.1479 | 3.7199 | 4.0991 | | 2.4900 | 4.7961 | H9 | 3.3443 | 2.0552 | 3.7199 | 2.1479 | 1.0763 | 3.2221 | 4.7961 | 2.4900 | | 4.0991 | H10 | 3.3443 | 2.0552 | 2.1479 | 3.7199 | 3.2221 | 1.0763 | 2.4900 | 4.7961 | 4.0991 | |
More geometry information
Calculated Bond Angles
| atom1 |
atom2 |
atom3 |
angle |
|
atom1 |
atom2 |
atom3 |
angle |
| N1 |
C3 |
C6 |
122.033 |
|
N1 |
C3 |
H7 |
117.161 |
| N1 |
C4 |
C5 |
122.033 |
|
N1 |
C4 |
H8 |
117.161 |
| N2 |
C5 |
C4 |
122.033 |
|
N2 |
C5 |
H9 |
117.161 |
| N2 |
C6 |
C3 |
122.033 |
|
N2 |
C6 |
H10 |
117.161 |
| C3 |
N1 |
C4 |
115.934 |
|
C3 |
C6 |
H10 |
120.806 |
| C4 |
C5 |
H9 |
120.806 |
|
C5 |
N2 |
C6 |
115.934 |
| C5 |
C4 |
H8 |
120.806 |
|
C6 |
C3 |
H7 |
120.806 |
Electronic energy levels
Electronic state
Charges, Dipole, Quadrupole and Polarizability