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All results from a given calculation for C4H4N2 (Pyrazine)

using model chemistry: M06-2X/3-21G*

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/3-21G*
 hartrees
Energy at 0K-262.726224
Energy at 298.15K-262.732242
HF Energy-262.726224
Nuclear repulsion energy207.632929
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/3-21G*
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 3255 3083 0.00      
2 Ag 1604 1519 0.00      
3 Ag 1280 1212 0.00      
4 Ag 1050 994 0.00      
5 Ag 625 592 0.00      
6 Au 1085 1028 0.00      
7 Au 372 352 0.00      
8 B1g 1003 950 0.00      
9 B1u 3233 3062 5.35      
10 B1u 1522 1442 18.25      
11 B1u 1178 1115 0.17      
12 B1u 1023 969 32.11      
13 B2g 1079 1022 0.00      
14 B2g 818 775 0.00      
15 B2u 3246 3075 25.90      
16 B2u 1462 1384 32.55      
17 B2u 1148 1088 7.26      
18 B2u 1102 1044 6.44      
19 B3g 3229 3059 0.00      
20 B3g 1562 1479 0.00      
21 B3g 1408 1334 0.00      
22 B3g 739 700 0.00      
23 B3u 857 812 40.59      
24 B3u 458 433 26.31      

Unscaled Zero Point Vibrational Energy (zpe) 17168.7 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 16262.2 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/3-21G*
ABC
0.20865 0.19882 0.10181

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.403
N2 0.000 0.000 -1.403
C3 0.000 1.150 0.697
C4 0.000 -1.150 0.697
C5 0.000 -1.150 -0.697
C6 0.000 1.150 -0.697
H7 0.000 2.075 1.256
H8 0.000 -2.075 1.256
H9 0.000 -2.075 -1.256
H10 0.000 2.075 -1.256

Atom - Atom Distances (Å)
  N1 N2 C3 C4 C5 C6 H7 H8 H9 H10
N12.80621.34931.34932.39382.39382.08072.08073.37323.3732
N22.80622.39382.39381.34931.34933.37323.37322.08072.0807
C31.34932.39382.29912.68831.39321.08183.27323.77012.1611
C41.34932.39382.29911.39322.68833.27321.08182.16113.7701
C52.39381.34932.68831.39322.29913.77012.16111.08183.2732
C62.39381.34931.39322.68832.29912.16113.77013.27321.0818
H72.08073.37321.08183.27323.77012.16114.15094.85192.5122
H82.08073.37323.27321.08182.16113.77014.15092.51224.8519
H93.37322.08073.77012.16111.08183.27324.85192.51224.1509
H103.37322.08072.16113.77013.27321.08182.51224.85194.1509

picture of Pyrazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C6 121.573 N1 C3 H7 117.286
N1 C4 C5 121.573 N1 C4 H8 117.286
N2 C5 C4 121.573 N2 C5 H9 117.286
N2 C6 C3 121.573 N2 C6 H10 117.286
C3 N1 C4 116.854 C3 C6 H10 121.141
C4 C5 H9 121.141 C5 N2 C6 116.854
C5 C4 H8 121.141 C6 C3 H7 121.141
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.502      
2 N -0.502      
3 C 0.009      
4 C 0.009      
5 C 0.009      
6 C 0.009      
7 H 0.242      
8 H 0.242      
9 H 0.242      
10 H 0.242      


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 -36.387 0.000 0.000
y 0.000 -26.252 0.000
z 0.000 0.000 -41.595
Traceless
 xyz
x -2.463 0.000 0.000
y 0.000 12.739 0.000
z 0.000 0.000 -10.275
Polar
3z2-r2-20.551
x2-y2-10.135
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.321 0.000 0.000
y 0.000 9.139 0.000
z 0.000 0.000 7.111


<r2> (average value of r2) Å2
<r2> 116.165
(<r2>)1/2 10.778