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

using model chemistry: PBEPBE/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 PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-264.017308
Energy at 298.15K-264.023046
Nuclear repulsion energy207.838902
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 PBEPBE/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 3135 3103 10.37      
2 A1 3087 3055 15.66      
3 A1 3078 3046 17.16      
4 A1 1563 1547 35.13      
5 A1 1393 1379 48.94      
6 A1 1133 1121 2.97      
7 A1 1054 1043 1.15      
8 A1 976 966 4.62      
9 A1 669 662 3.55      
10 A2 968 958 0.00      
11 A2 383 379 0.00      
12 B1 987 977 0.02      
13 B1 948 939 0.05      
14 B1 802 794 1.48      
15 B1 722 715 30.50      
16 B1 318 315 2.78      
17 B2 3080 3049 25.63      
18 B2 1560 1544 71.21      
19 B2 1446 1431 6.43      
20 B2 1347 1333 0.16      
21 B2 1253 1240 1.30      
22 B2 1207 1195 7.06      
23 B2 1062 1051 3.07      
24 B2 607 601 11.35      

Unscaled Zero Point Vibrational Energy (zpe) 16389.1 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 16220.3 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 PBEPBE/6-31G(2df,p)
ABC
0.20812 0.20048 0.10211

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.360
C2 0.000 0.000 -1.310
C3 0.000 1.188 0.624
C4 0.000 -1.188 0.624
N5 0.000 1.207 -0.720
N6 0.000 -1.207 -0.720
H7 0.000 0.000 2.452
H8 0.000 0.000 -2.407
H9 0.000 2.163 1.125
H10 0.000 -2.163 1.125

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66921.39711.39712.40452.40451.09233.76622.17612.1761
C22.66922.26902.26901.34331.34333.76151.09703.25683.2568
C31.39712.26902.37521.34392.74592.18013.25471.09703.3883
C41.39712.26902.37522.74591.34392.18013.25473.38831.0970
N52.40451.34331.34392.74592.41403.39382.07402.07813.8423
N62.40451.34332.74591.34392.41403.39382.07403.84232.0781
H71.09233.76152.18012.18013.39383.39384.85852.53802.5380
H83.76621.09703.25473.25472.07402.07404.85854.14144.1414
H92.17613.25681.09703.38832.07813.84232.53804.14144.3269
H102.17613.25683.38831.09703.84232.07812.53804.14144.3269

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 122.609 C1 C3 H9 121.035
C1 C4 N6 122.609 C1 C4 H10 121.035
C2 N5 C3 115.208 C2 N6 C4 115.208
C3 C1 C4 116.434 C3 C1 H7 121.783
C4 C1 H7 121.783 N5 C2 N6 127.932
N5 C2 H8 116.034 N5 C3 H9 116.356
N6 C2 H8 116.034 N6 C4 H10 116.356
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.137      
2 C 0.081      
3 C 0.025      
4 C 0.025      
5 N -0.244      
6 N -0.244      
7 H 0.118      
8 H 0.127      
9 H 0.125      
10 H 0.125      


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 2.148 2.148
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.947 0.000 0.000
y 0.000 -36.126 0.000
z 0.000 0.000 -30.323
Traceless
 xyz
x -1.723 0.000 0.000
y 0.000 -3.491 0.000
z 0.000 0.000 5.214
Polar
3z2-r210.428
x2-y21.179
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.708 0.000 0.000
y 0.000 8.846 0.000
z 0.000 0.000 9.578


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