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All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-190.442875
Energy at 298.15K-190.453103
Nuclear repulsion energy131.507020
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 B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3483 3332 0.00      
2 Ag 3032 2901 0.00      
3 Ag 1703 1630 0.00      
4 Ag 1504 1439 0.00      
5 Ag 1416 1355 0.00      
6 Ag 1139 1089 0.00      
7 Ag 1069 1023 0.00      
8 Ag 862 824 0.00      
9 Ag 459 439 0.00      
10 Au 3572 3417 0.35      
11 Au 3093 2959 78.13      
12 Au 1414 1353 2.12      
13 Au 1087 1040 0.32      
14 Au 759 726 0.91      
15 Au 279 267 125.35      
16 Au 149 142 0.08      
17 Bg 3573 3418 0.00      
18 Bg 3066 2933 0.00      
19 Bg 1389 1329 0.00      
20 Bg 1315 1258 0.00      
21 Bg 953 912 0.00      
22 Bg 316 302 0.00      
23 Bu 3483 3332 2.56      
24 Bu 3040 2909 95.01      
25 Bu 1702 1628 48.56      
26 Bu 1521 1455 0.95      
27 Bu 1341 1283 26.30      
28 Bu 1111 1063 10.59      
29 Bu 899 860 435.35      
30 Bu 266 254 20.38      

Unscaled Zero Point Vibrational Energy (zpe) 24496.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 23435.6 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 B3PW91/6-31G*
ABC
0.87917 0.12448 0.11784

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.396 0.659 0.000
C2 -0.396 -0.659 0.000
N3 -0.396 1.885 0.000
N4 0.396 -1.885 0.000
H5 1.009 -1.897 0.813
H6 1.009 -1.897 -0.813
H7 -1.009 1.897 0.813
H8 -1.009 1.897 -0.813
H9 -1.057 -0.683 -0.878
H10 -1.057 -0.683 0.878
H11 1.057 0.683 -0.878
H12 1.057 0.683 0.878

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.53731.45912.54382.75182.75182.04142.04142.16362.16361.09951.0995
C21.53732.54381.45912.04142.04142.75182.75181.09951.09952.16362.1636
N31.45912.54383.85184.11574.11571.01831.01832.79292.79292.08002.0800
N42.54381.45913.85181.01831.01834.11574.11572.08002.08002.79292.7929
H52.75182.04144.11571.01831.62604.29794.59522.93302.39733.08532.5814
H62.75182.04144.11571.01831.62604.59524.29792.39732.93302.58143.0853
H72.04142.75181.01834.11574.29794.59521.62603.08532.58142.93302.3973
H82.04142.75181.01834.11574.59524.29791.62602.58143.08532.39732.9330
H92.16361.09952.79292.08002.93302.39733.08532.58141.75622.51653.0687
H102.16361.09952.79292.08002.39732.93302.58143.08531.75623.06872.5165
H111.09952.16362.08002.79293.08532.58142.93302.39732.51653.06871.7562
H121.09952.16362.08002.79292.58143.08532.39732.93303.06872.51651.7562

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 116.172 C1 C2 H9 109.154
C1 C2 H10 109.154 C1 N3 H7 109.692
C1 N3 H8 109.692 C2 C1 N3 116.172
C2 C1 H11 109.154 C2 C1 H12 109.154
C2 N4 H5 109.692 C2 N4 H6 109.692
N3 C1 H11 107.943 N3 C1 H12 107.943
N4 C2 H9 107.943 N4 C2 H10 107.943
H5 N4 H6 105.953 H7 N3 H8 105.953
H9 C2 H10 105.999 H11 C1 H12 105.999
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.205      
2 C -0.205      
3 N -0.734      
4 N -0.734      
5 H 0.311      
6 H 0.311      
7 H 0.311      
8 H 0.311      
9 H 0.158      
10 H 0.158      
11 H 0.158      
12 H 0.158      


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 -23.348 -5.046 0.000
y -5.046 -35.854 0.000
z 0.000 0.000 -23.061
Traceless
 xyz
x 6.110 -5.046 0.000
y -5.046 -12.650 0.000
z 0.000 0.000 6.540
Polar
3z2-r213.080
x2-y212.507
xy-5.046
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.236 -0.708 0.000
y -0.708 5.667 0.000
z 0.000 0.000 5.271


<r2> (average value of r2) Å2
<r2> 106.667
(<r2>)1/2 10.328