return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H8N2 (Ethylenediamine)

using model chemistry: B3LYP/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 B3LYP/6-31G
 hartrees
Energy at 0K-190.455168
Energy at 298.15K-190.465076
Nuclear repulsion energy130.667859
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 B3LYP/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 Ag 3546 3411 0.00      
2 Ag 3023 2908 0.00      
3 Ag 1709 1644 0.00      
4 Ag 1521 1463 0.00      
5 Ag 1418 1364 0.00      
6 Ag 1119 1076 0.00      
7 Ag 1023 984 0.00      
8 Ag 576 554 0.00      
9 Ag 462 445 0.00      
10 Au 3662 3523 0.51      
11 Au 3087 2970 90.52      
12 Au 1392 1340 0.16      
13 Au 1070 1030 0.58      
14 Au 766 737 1.71      
15 Au 253 243 115.70      
16 Au 146 140 0.01      
17 Bg 3662 3523 0.00      
18 Bg 3057 2941 0.00      
19 Bg 1381 1329 0.00      
20 Bg 1309 1259 0.00      
21 Bg 939 903 0.00      
22 Bg 283 272 0.00      
23 Bu 3546 3411 0.48      
24 Bu 3032 2916 109.65      
25 Bu 1710 1645 56.26      
26 Bu 1539 1480 1.30      
27 Bu 1363 1311 9.60      
28 Bu 1101 1059 40.53      
29 Bu 583 561 687.85      
30 Bu 271 260 29.96      

Unscaled Zero Point Vibrational Energy (zpe) 24272.4 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 23350.1 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 B3LYP/6-31G
ABC
0.88316 0.12190 0.11591

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.401 0.663 0.000
C2 -0.401 -0.663 0.000
N3 -0.401 1.885 0.000
N4 0.401 -1.885 0.000
H5 0.938 -2.056 0.842
H6 0.938 -2.056 -0.842
H7 -0.938 2.056 0.842
H8 -0.938 2.056 -0.842
H9 -1.060 -0.680 -0.879
H10 -1.060 -0.680 0.879
H11 1.060 0.680 -0.879
H12 1.060 0.680 0.879

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.55041.46192.54832.89672.89672.10742.10742.17132.17131.09891.0989
C21.55042.54831.46192.10742.10742.89672.89671.09891.09892.17132.1713
N31.46192.54833.85474.24664.24661.01251.01252.79072.79072.08842.0884
N42.54831.46193.85471.01251.01254.24664.24662.08842.08842.79072.7907
H52.89672.10744.24661.01251.68344.51954.82292.97432.42633.23472.7393
H62.89672.10744.24661.01251.68344.82294.51952.42632.97432.73933.2347
H72.10742.89671.01254.24664.51954.82291.68343.23472.73932.97432.4263
H82.10742.89671.01254.24664.82294.51951.68342.73933.23472.42632.9743
H92.17131.09892.79072.08842.97432.42633.23472.73931.75832.51973.0725
H102.17131.09892.79072.08842.42632.97432.73933.23471.75833.07252.5197
H111.09892.17132.08842.79073.23472.73932.97432.42632.51973.07251.7583
H121.09892.17132.08842.79072.73933.23472.42632.97433.07252.51971.7583

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.522 C1 C2 H9 108.886
C1 C2 H10 108.886 C1 N3 H7 115.591
C1 N3 H8 115.591 C2 C1 N3 115.522
C2 C1 H11 108.886 C2 C1 H12 108.886
C2 N4 H5 115.591 C2 N4 H6 115.591
N3 C1 H11 108.448 N3 C1 H12 108.448
N4 C2 H9 108.448 N4 C2 H10 108.448
H5 N4 H6 112.458 H7 N3 H8 112.458
H9 C2 H10 106.258 H11 C1 H12 106.258
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.115      
2 C -0.115      
3 N -0.695      
4 N -0.695      
5 H 0.278      
6 H 0.278      
7 H 0.278      
8 H 0.278      
9 H 0.127      
10 H 0.127      
11 H 0.127      
12 H 0.127      


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 -24.264 -5.945 0.000
y -5.945 -33.477 0.000
z 0.000 0.000 -22.884
Traceless
 xyz
x 3.916 -5.945 0.000
y -5.945 -9.903 0.000
z 0.000 0.000 5.987
Polar
3z2-r211.973
x2-y29.213
xy-5.945
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.837 -0.861 0.000
y -0.861 5.511 0.000
z 0.000 0.000 5.200


<r2> (average value of r2) Å2
<r2> 108.711
(<r2>)1/2 10.426