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: B1B95/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B1B95/cc-pVDZ
 hartrees
Energy at 0K-190.422933
Energy at 298.15K-190.433189
Nuclear repulsion energy131.849576
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 B1B95/cc-pVDZ
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 3482 3347 0.00      
2 Ag 3026 2908 0.00      
3 Ag 1649 1585 0.00      
4 Ag 1452 1396 0.00      
5 Ag 1388 1334 0.00      
6 Ag 1142 1098 0.00      
7 Ag 1080 1038 0.00      
8 Ag 866 832 0.00      
9 Ag 459 441 0.00      
10 Au 3559 3421 0.10      
11 Au 3087 2967 74.40      
12 Au 1387 1334 3.02      
13 Au 1072 1031 0.27      
14 Au 757 728 1.03      
15 Au 282 271 97.18      
16 Au 149 144 0.04      
17 Bg 3560 3422 0.00      
18 Bg 3060 2941 0.00      
19 Bg 1365 1312 0.00      
20 Bg 1288 1239 0.00      
21 Bg 942 906 0.00      
22 Bg 322 310 0.00      
23 Bu 3481 3346 2.60      
24 Bu 3032 2914 97.56      
25 Bu 1648 1584 34.53      
26 Bu 1469 1412 0.53      
27 Bu 1308 1257 33.19      
28 Bu 1119 1075 16.07      
29 Bu 903 868 343.76      
30 Bu 259 249 17.68      

Unscaled Zero Point Vibrational Energy (zpe) 24295.2 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 23352.5 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 B1B95/cc-pVDZ
ABC
0.87911 0.12568 0.11887

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.394 0.656 0.000
C2 -0.394 -0.656 0.000
N3 -0.394 1.878 0.000
N4 0.394 -1.878 0.000
H5 1.017 -1.873 0.808
H6 1.017 -1.873 -0.808
H7 -1.017 1.873 0.808
H8 -1.017 1.873 -0.808
H9 -1.060 -0.674 -0.879
H10 -1.060 -0.674 0.879
H11 1.060 0.674 -0.879
H12 1.060 0.674 0.879

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.52951.45392.53352.72652.72652.03112.03112.15772.15771.10371.1037
C21.52952.53351.45392.03112.03112.72652.72651.10371.10372.15772.1577
N31.45392.53353.83744.08784.08781.02081.02082.78032.78032.08252.0825
N42.53351.45393.83741.02081.02084.08784.08782.08252.08252.78032.7803
H52.72652.03114.08781.02081.61624.26234.55842.93282.39973.05542.5480
H62.72652.03114.08781.02081.61624.55844.26232.39972.93282.54803.0554
H72.03112.72651.02084.08784.26234.55841.61623.05542.54802.93282.3997
H82.03112.72651.02084.08784.55844.26231.61622.54803.05542.39972.9328
H92.15771.10372.78032.08252.93282.39973.05542.54801.75892.51293.0673
H102.15771.10372.78032.08252.39972.93282.54803.05541.75893.06732.5129
H111.10372.15772.08252.78033.05542.54802.93282.39972.51293.06731.7589
H121.10372.15772.08252.78032.54803.05542.39972.93283.06732.51291.7589

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 116.227 C1 C2 H9 108.979
C1 C2 H10 108.979 C1 N3 H7 109.060
C1 N3 H8 109.060 C2 C1 N3 116.227
C2 C1 H11 108.979 C2 C1 H12 108.979
C2 N4 H5 109.060 C2 N4 H6 109.060
N3 C1 H11 108.245 N3 C1 H12 108.245
N4 C2 H9 108.245 N4 C2 H10 108.245
H5 N4 H6 104.676 H7 N3 H8 104.676
H9 C2 H10 105.654 H11 C1 H12 105.654
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.003      
2 C -0.003      
3 N -0.196      
4 N -0.196      
5 H 0.079      
6 H 0.079      
7 H 0.079      
8 H 0.079      
9 H 0.020      
10 H 0.020      
11 H 0.020      
12 H 0.020      


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 -23.726 -4.491 0.000
y -4.491 -34.505 0.000
z 0.000 0.000 -23.452
Traceless
 xyz
x 5.253 -4.491 0.000
y -4.491 -10.916 0.000
z 0.000 0.000 5.663
Polar
3z2-r211.326
x2-y210.779
xy-4.491
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.653 -0.617 0.000
y -0.617 5.926 0.000
z 0.000 0.000 5.452


<r2> (average value of r2) Å2
<r2> 105.750
(<r2>)1/2 10.284