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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: B97D3/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at B97D3/6-311G**
 hartrees
Energy at 0K-264.207516
Energy at 298.15K-264.213297
HF Energy-264.207516
Nuclear repulsion energy207.879882
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 B97D3/6-311G**
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 3109 3064 0.00      
2 Ag 1569 1546 0.00      
3 Ag 1226 1208 0.00      
4 Ag 1015 1000 0.00      
5 Ag 600 591 0.00      
6 Au 963 949 0.00      
7 Au 316 311 0.00      
8 B1g 917 904 0.00      
9 B1u 3087 3042 12.44      
10 B1u 1473 1452 1.25      
11 B1u 1140 1124 5.03      
12 B1u 1011 996 36.26      
13 B2g 956 943 0.00      
14 B2g 758 747 0.00      
15 B2u 3102 3057 104.15      
16 B2u 1409 1389 28.90      
17 B2u 1216 1199 1.00      
18 B2u 1062 1047 9.48      
19 B3g 3086 3042 0.00      
20 B3g 1523 1501 0.00      
21 B3g 1341 1322 0.00      
22 B3g 705 695 0.00      
23 B3u 776 765 28.84      
24 B3u 413 408 20.41      

Unscaled Zero Point Vibrational Energy (zpe) 16385.9 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 16151.6 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 B97D3/6-311G**
ABC
0.21287 0.19597 0.10204

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-311G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.415
N2 0.000 0.000 -1.415
C3 0.000 1.136 0.700
C4 0.000 -1.136 0.700
C5 0.000 -1.136 -0.700
C6 0.000 1.136 -0.700
H7 0.000 2.071 1.261
H8 0.000 -2.071 1.261
H9 0.000 -2.071 -1.261
H10 0.000 2.071 -1.261

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.83041.34201.34202.40082.40082.07702.07703.38403.3840
N22.83042.40082.40081.34201.34203.38403.38402.07702.0770
C31.34202.40082.27112.66801.40001.09093.25553.75882.1727
C41.34202.40082.27111.40002.66803.25551.09092.17273.7588
C52.40081.34202.66801.40002.27113.75882.17271.09093.2555
C62.40081.34201.40002.66802.27112.17273.75883.25551.0909
H72.07703.38401.09093.25553.75882.17274.14264.84972.5217
H82.07703.38403.25551.09092.17273.75884.14262.52174.8497
H93.38402.07703.75882.17271.09093.25554.84972.52174.1426
H103.38402.07702.17273.75883.25551.09092.52174.84974.1426

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.792 N1 C3 H7 117.295
N1 C4 C5 121.792 N1 C4 H8 117.295
N2 C5 C4 121.792 N2 C5 H9 117.295
N2 C6 C3 121.792 N2 C6 H10 117.295
C3 N1 C4 116.415 C3 C6 H10 120.913
C4 C5 H9 120.913 C5 N2 C6 116.415
C5 C4 H8 120.913 C6 C3 H7 120.913
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.245      
2 N -0.245      
3 C 0.011      
4 C 0.011      
5 C 0.011      
6 C 0.011      
7 H 0.111      
8 H 0.111      
9 H 0.111      
10 H 0.111      


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 -35.538 0.000 0.000
y 0.000 -26.976 0.000
z 0.000 0.000 -40.656
Traceless
 xyz
x -1.722 0.000 0.000
y 0.000 11.121 0.000
z 0.000 0.000 -9.399
Polar
3z2-r2-18.797
x2-y2-8.562
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.844 0.000 0.000
y 0.000 10.445 0.000
z 0.000 0.000 8.592


<r2> (average value of r2) Å2
<r2> 115.748
(<r2>)1/2 10.759