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: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-190.471984
Energy at 298.15K-190.482114
Nuclear repulsion energy131.464493
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 B3PW91/6-31+G**
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 3530 3389 0.00      
2 Ag 3030 2909 0.00      
3 Ag 1669 1603 0.00      
4 Ag 1480 1421 0.00      
5 Ag 1399 1343 0.00      
6 Ag 1120 1076 0.00      
7 Ag 1053 1011 0.00      
8 Ag 800 768 0.00      
9 Ag 459 441 0.00      
10 Au 3624 3479 3.23      
11 Au 3093 2970 71.30      
12 Au 1392 1336 0.81      
13 Au 1068 1025 0.26      
14 Au 753 723 0.48      
15 Au 257 247 119.92      
16 Au 145 139 0.13      
17 Bg 3624 3480 0.00      
18 Bg 3066 2943 0.00      
19 Bg 1368 1314 0.00      
20 Bg 1296 1244 0.00      
21 Bg 939 902 0.00      
22 Bg 288 277 0.00      
23 Bu 3529 3388 1.05      
24 Bu 3038 2917 93.75      
25 Bu 1669 1602 66.23      
26 Bu 1496 1436 1.56      
27 Bu 1326 1274 18.09      
28 Bu 1099 1055 31.27      
29 Bu 829 796 427.49      
30 Bu 270 259 21.86      

Unscaled Zero Point Vibrational Energy (zpe) 24354.4 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 23382.7 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 B3PW91/6-31+G**
ABC
0.88191 0.12417 0.11766

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

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 1.883 0.000
N4 0.396 -1.883 0.000
H5 0.995 -1.933 0.818
H6 0.995 -1.933 -0.818
H7 -0.995 1.933 0.818
H8 -0.995 1.933 -0.818
H9 -1.057 -0.682 -0.877
H10 -1.057 -0.682 0.877
H11 1.057 0.682 -0.877
H12 1.057 0.682 0.877

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.53801.45772.54172.78312.78312.05622.05622.16312.16311.09851.0985
C21.53802.54171.45772.05622.05622.78312.78311.09851.09852.16312.1631
N31.45772.54173.84774.14284.14281.01531.01532.78972.78972.07912.0791
N42.54171.45773.84771.01531.01534.14284.14282.07912.07912.78972.7897
H52.78312.05624.14281.01531.63664.34784.64562.94122.40383.11702.6160
H62.78312.05624.14281.01531.63664.64564.34782.40382.94122.61603.1170
H72.05622.78311.01534.14284.34784.64561.63663.11702.61602.94122.4038
H82.05622.78311.01534.14284.64564.34781.63662.61603.11702.40382.9412
H92.16311.09852.78972.07912.94122.40383.11702.61601.75492.51513.0668
H102.16311.09852.78972.07912.40382.94122.61603.11701.75493.06682.5151
H111.09852.16312.07912.78973.11702.61602.94122.40382.51513.06681.7549
H121.09852.16312.07912.78972.61603.11702.40382.94123.06682.51511.7549

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 116.055 C1 C2 H9 109.120
C1 C2 H10 109.120 C1 N3 H7 111.233
C1 N3 H8 111.233 C2 C1 N3 116.055
C2 C1 H11 109.120 C2 C1 H12 109.120
C2 N4 H5 111.233 C2 N4 H6 111.233
N3 C1 H11 108.027 N3 C1 H12 108.027
N4 C2 H9 108.027 N4 C2 H10 108.027
H5 N4 H6 107.407 H7 N3 H8 107.407
H9 C2 H10 106.031 H11 C1 H12 106.031
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.274      
2 C -0.274      
3 N -0.620      
4 N -0.620      
5 H 0.294      
6 H 0.294      
7 H 0.294      
8 H 0.294      
9 H 0.153      
10 H 0.153      
11 H 0.153      
12 H 0.153      


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 -24.454 -5.259 0.000
y -5.259 -36.789 0.000
z 0.000 0.000 -23.325
Traceless
 xyz
x 5.603 -5.259 0.000
y -5.259 -12.899 0.000
z 0.000 0.000 7.296
Polar
3z2-r214.592
x2-y212.335
xy-5.259
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.367 -0.310 0.000
y -0.310 7.237 0.000
z 0.000 0.000 5.735


<r2> (average value of r2) Å2
<r2> 107.493
(<r2>)1/2 10.368