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All results from a given calculation for C4H4N2 (1,3-Diazine)

using model chemistry: HF/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/6-31G*
 hartrees
Energy at 0K-262.693488
Energy at 298.15K-262.699679
HF Energy-262.693488
Nuclear repulsion energy211.159754
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 HF/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 A1 3411 3065 7.51      
2 A1 3397 3052 32.95      
3 A1 3371 3029 10.12      
4 A1 1801 1618 91.44      
5 A1 1574 1414 86.15      
6 A1 1261 1133 1.72      
7 A1 1164 1046 1.72      
8 A1 1103 991 6.37      
9 A1 752 676 4.43      
10 A2 1131 1017 0.00      
11 A2 461 414 0.00      
12 B1 1156 1039 0.06      
13 B1 1096 984 2.27      
14 B1 911 819 3.89      
15 B1 788 708 54.71      
16 B1 416 374 3.26      
17 B2 3376 3034 37.63      
18 B2 1801 1618 132.18      
19 B2 1642 1475 23.49      
20 B2 1519 1365 1.16      
21 B2 1360 1222 10.92      
22 B2 1213 1090 9.26      
23 B2 1165 1047 2.93      
24 B2 683 614 14.07      

Unscaled Zero Point Vibrational Energy (zpe) 18276.4 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 16421.4 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 HF/6-31G*
ABC
0.21363 0.20788 0.10536

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.337
C2 0.000 0.000 -1.287
C3 0.000 1.176 0.610
C4 0.000 -1.176 0.610
N5 0.000 1.183 -0.705
N6 0.000 -1.183 -0.705
H7 0.000 0.000 2.408
H8 0.000 0.000 -2.355
H9 0.000 2.130 1.098
H10 0.000 -2.130 1.098

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.62341.38251.38252.35982.35981.07173.69152.14292.1429
C22.62342.23242.23241.31811.31813.69511.06823.19733.1973
C31.38252.23242.35291.31582.70152.14863.19021.07063.3418
C41.38252.23242.35292.70151.31582.14863.19023.34181.0706
N52.35981.31811.31582.70152.36583.33082.02992.03683.7716
N62.35981.31812.70151.31582.36583.33082.02993.77162.0368
H71.07173.69512.14862.14863.33083.33084.76322.50042.5004
H83.69151.06823.19023.19022.02992.02994.76324.05694.0569
H92.14293.19731.07063.34182.03683.77162.50044.05694.2592
H102.14293.19733.34181.07063.77162.03682.50044.05694.2592

picture of 1,3-Diazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 N5 121.965 C1 C3 H9 121.222
C1 C4 N6 121.965 C1 C4 H10 121.222
C2 N5 C3 115.894 C2 N6 C4 115.894
C3 C1 C4 116.631 C3 C1 H7 121.685
C4 C1 H7 121.685 N5 C2 N6 127.651
N5 C2 H8 116.175 N5 C3 H9 116.813
N6 C2 H8 116.175 N6 C4 H10 116.813
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.299      
2 C 0.260      
3 C 0.097      
4 C 0.097      
5 N -0.513      
6 N -0.513      
7 H 0.223      
8 H 0.214      
9 H 0.217      
10 H 0.217      


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 2.423 2.423
CHELPG 0.000 0.000 2.408 2.408
AIM 0.000 0.000 1.095 1.095
ESP 0.000 0.000 2.440 2.440


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.892 0.000 0.000
y 0.000 -36.929 0.004
z 0.000 0.004 -30.424
Traceless
 xyz
x -2.216 0.000 0.000
y 0.000 -3.771 0.004
z 0.000 0.004 5.987
Polar
3z2-r211.973
x2-y21.037
xy0.000
xz0.000
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.956 0.000 0.000
y 0.000 7.998 0.004
z 0.000 0.004 8.480


<r2> (average value of r2) Å2
<r2> 112.924
(<r2>)1/2 10.627