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: M06-2X/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 M06-2X/6-31G*
 hartrees
Energy at 0K-264.203017
Energy at 298.15K-264.208938
HF Energy-264.203017
Nuclear repulsion energy209.080991
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 M06-2X/6-31G*
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 3229 3058 0.00      
2 Ag 1681 1592 0.00      
3 Ag 1272 1204 0.00      
4 Ag 1072 1016 0.00      
5 Ag 606 574 0.00      
6 Au 1018 964 0.00      
7 Au 361 342 0.00      
8 B1g 962 911 0.00      
9 B1u 3209 3039 4.73      
10 B1u 1547 1465 1.53      
11 B1u 1187 1124 7.11      
12 B1u 1038 983 34.37      
13 B2g 1005 952 0.00      
14 B2g 783 741 0.00      
15 B2u 3223 3052 50.89      
16 B2u 1470 1392 37.07      
17 B2u 1236 1171 3.98      
18 B2u 1115 1056 12.89      
19 B3g 3208 3038 0.00      
20 B3g 1649 1562 0.00      
21 B3g 1386 1313 0.00      
22 B3g 726 688 0.00      
23 B3u 817 774 23.52      
24 B3u 436 413 22.63      

Unscaled Zero Point Vibrational Energy (zpe) 17118.3 cm-1
Scaled (by 0.947) Zero Point Vibrational Energy (zpe) 16211.0 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 M06-2X/6-31G*
ABC
0.21521 0.19839 0.10323

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.405
N2 0.000 0.000 -1.405
C3 0.000 1.129 0.697
C4 0.000 -1.129 0.697
C5 0.000 -1.129 -0.697
C6 0.000 1.129 -0.697
H7 0.000 2.062 1.255
H8 0.000 -2.062 1.255
H9 0.000 -2.062 -1.255
H10 0.000 2.062 -1.255

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.81051.33281.33282.38632.38632.06772.06773.36573.3657
N22.81052.38632.38631.33281.33283.36573.36572.06772.0677
C31.33282.38632.25812.65371.39401.08713.23963.74072.1632
C41.33282.38632.25811.39402.65373.23961.08712.16323.7407
C52.38631.33282.65371.39402.25813.74072.16321.08713.2396
C62.38631.33281.39402.65372.25812.16323.74073.23961.0871
H72.06773.36571.08713.23963.74072.16324.12454.82782.5091
H82.06773.36573.23961.08712.16323.74074.12452.50914.8278
H93.36572.06773.74072.16321.08713.23964.82782.50914.1245
H103.36572.06772.16323.74073.23961.08712.50914.82784.1245

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 122.100 N1 C3 H7 117.043
N1 C4 C5 122.100 N1 C4 H8 117.043
N2 C5 C4 122.100 N2 C5 H9 117.043
N2 C6 C3 122.100 N2 C6 H10 117.043
C3 N1 C4 115.800 C3 C6 H10 120.857
C4 C5 H9 120.857 C5 N2 C6 115.800
C5 C4 H8 120.857 C6 C3 H7 120.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.396      
2 N -0.396      
3 C 0.014      
4 C 0.014      
5 C 0.014      
6 C 0.014      
7 H 0.185      
8 H 0.185      
9 H 0.185      
10 H 0.185      


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 -35.526 0.000 0.000
y 0.000 -26.484 0.000
z 0.000 0.000 -40.429
Traceless
 xyz
x -2.070 0.000 0.000
y 0.000 11.494 0.000
z 0.000 0.000 -9.424
Polar
3z2-r2-18.847
x2-y2-9.042
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.036 0.000 0.000
y 0.000 9.657 0.000
z 0.000 0.000 7.889


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