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

using model chemistry: HF/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-43.503825
Energy at 298.15K-43.510051
Nuclear repulsion energy105.592312
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/CEP-121G
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 3409 3111 9.27      
2 A1 3395 3098 25.44      
3 A1 3362 3068 3.47      
4 A1 1729 1578 55.59      
5 A1 1534 1400 82.17      
6 A1 1230 1123 2.10      
7 A1 1142 1042 1.70      
8 A1 1058 966 3.45      
9 A1 738 673 6.01      
10 A2 1109 1012 0.00      
11 A2 473 432 0.00      
12 B1 1126 1028 0.01      
13 B1 1084 990 0.15      
14 B1 908 829 16.26      
15 B1 810 739 59.65      
16 B1 421 384 4.77      
17 B2 3372 3077 24.64      
18 B2 1733 1581 98.14      
19 B2 1599 1459 20.77      
20 B2 1496 1365 1.17      
21 B2 1328 1212 10.24      
22 B2 1191 1087 10.71      
23 B2 1162 1060 1.06      
24 B2 681 622 13.08      

Unscaled Zero Point Vibrational Energy (zpe) 18044.1 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 16465.3 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/CEP-121G
ABC
0.20651 0.20263 0.10228

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.354
C2 0.000 0.000 -1.340
C3 0.000 1.192 0.621
C4 0.000 -1.192 0.621
N5 0.000 1.192 -0.724
N6 0.000 -1.192 -0.724
H7 0.000 0.000 2.426
H8 0.000 0.000 -2.411
H9 0.000 2.152 1.101
H10 0.000 -2.152 1.101

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.69481.39951.39952.39572.39571.07143.76512.16652.1665
C22.69482.29522.29521.34161.34163.76621.07033.25423.2542
C31.39952.29522.38391.34502.73692.16293.25761.07303.3778
C41.39952.29522.38392.73691.34502.16293.25763.37781.0730
N52.39571.34161.34502.73692.38323.36772.06512.06213.8089
N62.39571.34162.73691.34502.38323.36772.06513.80892.0621
H71.07143.76622.16292.16293.36773.36774.83652.52682.5268
H83.76511.07033.25763.25762.06512.06514.83654.11844.1184
H92.16653.25421.07303.37782.06213.80892.52684.11844.3032
H102.16653.25423.37781.07303.80892.06212.52684.11844.3032

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 121.587 C1 C3 H9 121.827
C1 C4 N6 121.587 C1 C4 H10 121.827
C2 N5 C3 117.368 C2 N6 C4 117.368
C3 C1 C4 116.796 C3 C1 H7 121.602
C4 C1 H7 121.602 N5 C2 N6 125.294
N5 C2 H8 117.353 N5 C3 H9 116.586
N6 C2 H8 117.353 N6 C4 H10 116.586
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.093      
2 C -0.198      
3 C -0.223      
4 C -0.223      
5 N -0.023      
6 N -0.023      
7 H 0.213      
8 H 0.196      
9 H 0.187      
10 H 0.187      


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 2.869 2.869
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.896 0.000 0.000
y 0.000 8.408 0.000
z 0.000 0.000 8.967


<r2> (average value of r2) Å2
<r2> 94.123
(<r2>)1/2 9.702