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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: SVWN/6-311G**

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/6-311G**
 hartrees
Energy at 0K-262.907888
Energy at 298.15K-262.913657
Nuclear repulsion energy209.644465
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/6-311G**
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 3087 3055 0.00      
2 Ag 1597 1580 0.00      
3 Ag 1215 1203 0.00      
4 Ag 1040 1029 0.00      
5 Ag 589 583 0.00      
6 Au 968 958 0.00      
7 Au 298 295 0.00      
8 B1g 914 904 0.00      
9 B1u 3067 3035 1.93      
10 B1u 1470 1454 1.76      
11 B1u 1147 1135 10.88      
12 B1u 1009 998 38.19      
13 B2g 962 952 0.00      
14 B2g 771 762 0.00      
15 B2u 3079 3047 56.46      
16 B2u 1408 1394 35.01      
17 B2u 1307 1294 0.05      
18 B2u 1067 1056 6.64      
19 B3g 3066 3034 0.00      
20 B3g 1586 1569 0.00      
21 B3g 1315 1301 0.00      
22 B3g 706 698 0.00      
23 B3u 770 762 33.99      
24 B3u 412 408 21.13      

Unscaled Zero Point Vibrational Energy (zpe) 16424.5 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 16253.7 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/6-311G**
ABC
0.21571 0.20045 0.10390

See section I.F.4 to change rotational constant units
Geometric Data calculated at SVWN/6-311G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.396
N2 0.000 0.000 -1.396
C3 0.000 1.127 0.694
C4 0.000 -1.127 0.694
C5 0.000 -1.127 -0.694
C6 0.000 1.127 -0.694
H7 0.000 2.068 1.258
H8 0.000 -2.068 1.258
H9 0.000 -2.068 -1.258
H10 0.000 2.068 -1.258

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.79301.32771.32772.37462.37462.07232.07233.36443.3644
N22.79302.37462.37461.32771.32773.36443.36442.07232.0723
C31.32772.37462.25312.64611.38771.09703.24363.74312.1665
C41.32772.37462.25311.38772.64613.24361.09702.16653.7431
C52.37461.32772.64611.38772.25313.74312.16651.09703.2436
C62.37461.32771.38772.64612.25312.16653.74313.24361.0970
H72.07233.36441.09703.24363.74312.16654.13534.84012.5150
H82.07233.36443.24361.09702.16653.74314.13532.51504.8401
H93.36442.07233.74312.16651.09703.24364.84012.51504.1353
H103.36442.07232.16653.74313.24361.09702.51504.84014.1353

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.953 N1 C3 H7 117.128
N1 C4 C5 121.953 N1 C4 H8 117.128
N2 C5 C4 121.953 N2 C5 H9 117.128
N2 C6 C3 121.953 N2 C6 H10 117.128
C3 N1 C4 116.094 C3 C6 H10 120.919
C4 C5 H9 120.919 C5 N2 C6 116.094
C5 C4 H8 120.919 C6 C3 H7 120.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at SVWN/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.230      
2 N -0.230      
3 C -0.035      
4 C -0.035      
5 C -0.035      
6 C -0.035      
7 H 0.150      
8 H 0.150      
9 H 0.150      
10 H 0.150      


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 -35.866 0.000 0.000
y 0.000 -26.847 0.000
z 0.000 0.000 -40.687
Traceless
 xyz
x -2.099 0.000 0.000
y 0.000 11.430 0.000
z 0.000 0.000 -9.331
Polar
3z2-r2-18.662
x2-y2-9.019
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.843 0.000 0.000
y 0.000 10.366 0.000
z 0.000 0.000 8.418


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