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

using model chemistry: HF/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-262.718171
Energy at 298.15K-262.724374
Nuclear repulsion energy211.498686
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(2df,p)
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 3374 3055 8.39      
2 A1 3338 3023 25.69      
3 A1 3321 3007 14.79      
4 A1 1783 1615 91.56      
5 A1 1561 1413 87.34      
6 A1 1255 1136 2.15      
7 A1 1159 1049 2.03      
8 A1 1095 992 6.32      
9 A1 748 677 3.70      
10 A2 1135 1027 0.00      
11 A2 461 417 0.00      
12 B1 1160 1050 0.01      
13 B1 1099 995 1.94      
14 B1 914 828 3.05      
15 B1 787 713 47.18      
16 B1 413 374 2.85      
17 B2 3325 3011 34.35      
18 B2 1784 1615 135.50      
19 B2 1627 1473 25.14      
20 B2 1507 1365 1.13      
21 B2 1348 1221 10.56      
22 B2 1197 1084 7.24      
23 B2 1143 1035 5.64      
24 B2 681 617 14.85      

Unscaled Zero Point Vibrational Energy (zpe) 18106.4 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 16395.4 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(2df,p)
ABC
0.21434 0.20861 0.10572

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.344
C2 0.000 0.000 -1.294
C3 0.000 1.169 0.612
C4 0.000 -1.169 0.612
N5 0.000 1.178 -0.706
N6 0.000 -1.178 -0.706
H7 0.000 0.000 2.417
H8 0.000 0.000 -2.370
H9 0.000 2.129 1.100
H10 0.000 -2.129 1.100

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.63771.37951.37952.36442.36441.07283.71392.14332.1433
C22.63772.23612.23611.31621.31623.71051.07623.20423.2042
C31.37952.23612.33881.31852.69212.15033.20331.07713.3348
C41.37952.23612.33882.69211.31852.15033.20333.33481.0771
N52.36441.31621.31852.69212.35563.33772.03842.04213.7686
N62.36441.31622.69211.31852.35563.33772.03843.76862.0421
H71.07283.71052.15032.15033.33773.33774.78672.50342.5034
H83.71391.07623.20333.20332.03842.03844.78674.07174.0717
H92.14333.20421.07713.33482.04213.76862.50344.07174.2589
H102.14333.20423.33481.07713.76862.04212.50344.07174.2589

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 122.402 C1 C3 H9 121.005
C1 C4 N6 122.402 C1 C4 H10 121.005
C2 N5 C3 116.146 C2 N6 C4 116.146
C3 C1 C4 115.927 C3 C1 H7 122.037
C4 C1 H7 122.037 N5 C2 N6 126.977
N5 C2 H8 116.511 N5 C3 H9 116.593
N6 C2 H8 116.511 N6 C4 H10 116.593
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.241      
2 C 0.118      
3 C 0.045      
4 C 0.045      
5 N -0.315      
6 N -0.315      
7 H 0.166      
8 H 0.167      
9 H 0.165      
10 H 0.165      


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 2.298 2.298
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.560 0.000 0.000
y 0.000 -36.368 0.000
z 0.000 0.000 -30.196
Traceless
 xyz
x -2.278 0.000 0.000
y 0.000 -3.491 0.000
z 0.000 0.000 5.768
Polar
3z2-r211.536
x2-y20.809
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.617 0.000 0.000
y 0.000 8.226 0.000
z 0.000 0.000 8.713


<r2> (average value of r2) Å2
<r2> 112.400
(<r2>)1/2 10.602