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-190.529548
Energy at 298.15K-190.539776
Nuclear repulsion energy131.252038
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 3478 3342 0.00      
2 Ag 3017 2898 0.00      
3 Ag 1674 1608 0.00      
4 Ag 1494 1436 0.00      
5 Ag 1408 1353 0.00      
6 Ag 1121 1077 0.00      
7 Ag 1050 1009 0.00      
8 Ag 847 813 0.00      
9 Ag 458 440 0.00      
10 Au 3561 3422 0.98      
11 Au 3074 2953 79.29      
12 Au 1402 1347 1.75      
13 Au 1079 1036 0.36      
14 Au 761 732 0.60      
15 Au 279 268 113.57      
16 Au 149 143 0.08      
17 Bg 3562 3422 0.00      
18 Bg 3047 2928 0.00      
19 Bg 1380 1326 0.00      
20 Bg 1307 1256 0.00      
21 Bg 949 912 0.00      
22 Bg 316 303 0.00      
23 Bu 3478 3341 3.13      
24 Bu 3024 2906 94.47      
25 Bu 1673 1607 40.52      
26 Bu 1513 1453 0.16      
27 Bu 1337 1284 28.40      
28 Bu 1088 1046 10.21      
29 Bu 883 848 410.11      
30 Bu 269 259 18.93      

Unscaled Zero Point Vibrational Energy (zpe) 24338.0 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 23383.9 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
0.87646 0.12388 0.11725

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 0.397 0.660 0.000
C2 -0.397 -0.660 0.000
N3 -0.397 1.890 0.000
N4 0.397 -1.890 0.000
H5 1.011 -1.902 0.813
H6 1.011 -1.902 -0.813
H7 -1.011 1.902 0.813
H8 -1.011 1.902 -0.813
H9 -1.058 -0.682 -0.878
H10 -1.058 -0.682 0.878
H11 1.058 0.682 -0.878
H12 1.058 0.682 0.878

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.54101.46432.54992.75682.75682.04592.04592.16522.16521.09871.0987
C21.54102.54991.46432.04592.04592.75682.75681.09871.09872.16522.1652
N31.46432.54993.86244.12564.12561.01841.01842.79622.79622.08522.0852
N42.54991.46433.86241.01841.01844.12564.12562.08522.08522.79622.7962
H52.75682.04594.12561.01841.62544.30754.60402.93702.40253.08772.5846
H62.75682.04594.12561.01841.62544.60404.30752.40252.93702.58463.0877
H72.04592.75681.01844.12564.30754.60401.62543.08772.58462.93702.4025
H82.04592.75681.01844.12564.60404.30751.62542.58463.08772.40252.9370
H92.16521.09872.79622.08522.93702.40253.08772.58461.75602.51643.0685
H102.16521.09872.79622.08522.40252.93702.58463.08771.75603.06852.5164
H111.09872.16522.08522.79623.08772.58462.93702.40252.51643.06851.7560
H121.09872.16522.08522.79622.58463.08772.40252.93703.06852.51641.7560

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 116.073 C1 C2 H9 109.067
C1 C2 H10 109.067 C1 N3 H7 109.687
C1 N3 H8 109.687 C2 C1 N3 116.073
C2 C1 H11 109.067 C2 C1 H12 109.067
C2 N4 H5 109.687 C2 N4 H6 109.687
N3 C1 H11 108.044 N3 C1 H12 108.044
N4 C2 H9 108.044 N4 C2 H10 108.044
H5 N4 H6 105.887 H7 N3 H8 105.887
H9 C2 H10 106.091 H11 C1 H12 106.091
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 -0.066      
2 C -0.066      
3 N -0.591      
4 N -0.591      
5 H 0.235      
6 H 0.235      
7 H 0.235      
8 H 0.235      
9 H 0.094      
10 H 0.094      
11 H 0.094      
12 H 0.094      


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 -23.593 -4.825 0.000
y -4.825 -35.494 0.000
z 0.000 0.000 -23.369
Traceless
 xyz
x 5.839 -4.825 0.000
y -4.825 -12.013 0.000
z 0.000 0.000 6.174
Polar
3z2-r212.348
x2-y211.901
xy-4.825
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.335 -0.729 0.000
y -0.729 5.765 0.000
z 0.000 0.000 5.365


<r2> (average value of r2) Å2
<r2> 107.121
(<r2>)1/2 10.350