return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: SVWN/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 SVWN/cc-pVDZ
 hartrees
Energy at 0K-262.850062
Energy at 298.15K-262.855815
Nuclear repulsion energy208.744313
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 SVWN/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3093 3069 0.00      
2 Ag 1611 1598 0.00      
3 Ag 1208 1198 0.00      
4 Ag 1043 1035 0.00      
5 Ag 583 578 0.00      
6 Au 964 956 0.00      
7 Au 301 298 0.00      
8 B1g 908 901 0.00      
9 B1u 3073 3048 3.33      
10 B1u 1469 1457 1.50      
11 B1u 1143 1134 8.28      
12 B1u 1002 995 37.60      
13 B2g 956 948 0.00      
14 B2g 769 763 0.00      
15 B2u 3087 3062 57.14      
16 B2u 1405 1394 32.95      
17 B2u 1335 1324 0.31      
18 B2u 1065 1057 5.93      
19 B3g 3072 3048 0.00      
20 B3g 1595 1583 0.00      
21 B3g 1300 1290 0.00      
22 B3g 698 693 0.00      
23 B3u 766 760 24.88      
24 B3u 409 406 17.15      

Unscaled Zero Point Vibrational Energy (zpe) 16426.7 cm-1
Scaled (by 0.9921) Zero Point Vibrational Energy (zpe) 16296.9 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at SVWN/cc-pVDZ
ABC
0.21477 0.19799 0.10302

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.407
N2 0.000 0.000 -1.407
C3 0.000 1.128 0.697
C4 0.000 -1.128 0.697
C5 0.000 -1.128 -0.697
C6 0.000 1.128 -0.697
H7 0.000 2.079 1.262
H8 0.000 -2.079 1.262
H9 0.000 -2.079 -1.262
H10 0.000 2.079 -1.262

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.81351.33281.33282.38692.38692.08362.08363.38243.3824
N22.81352.38692.38691.33281.33283.38243.38242.08362.0836
C31.33282.38692.25602.65171.39361.10573.25593.75732.1769
C41.33282.38692.25601.39362.65173.25591.10572.17693.7573
C52.38691.33282.65171.39362.25603.75732.17691.10573.2559
C62.38691.33281.39362.65172.25602.17693.75733.25591.1057
H72.08363.38241.10573.25593.75732.17694.15714.86302.5233
H82.08363.38243.25591.10572.17693.75734.15712.52334.8630
H93.38242.08363.75732.17691.10573.25594.86302.52334.1571
H103.38242.08362.17693.75733.25591.10572.52334.86304.1571

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 122.186 N1 C3 H7 117.093
N1 C4 C5 122.186 N1 C4 H8 117.093
N2 C5 C4 122.186 N2 C5 H9 117.093
N2 C6 C3 122.186 N2 C6 H10 117.093
C3 N1 C4 115.628 C3 C6 H10 120.721
C4 C5 H9 120.721 C5 N2 C6 115.628
C5 C4 H8 120.721 C6 C3 H7 120.721
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at SVWN/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.089      
2 N -0.089      
3 C -0.005      
4 C -0.005      
5 C -0.005      
6 C -0.005      
7 H 0.049      
8 H 0.049      
9 H 0.049      
10 H 0.049      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.434 0.000 0.000
y 0.000 -27.276 0.000
z 0.000 0.000 -39.784
Traceless
 xyz
x -1.904 0.000 0.000
y 0.000 10.333 0.000
z 0.000 0.000 -8.430
Polar
3z2-r2-16.859
x2-y2-8.158
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.441 0.000 0.000
y 0.000 10.454 0.000
z 0.000 0.000 8.243


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000