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: mPW1PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at mPW1PW91/STO-3G
 hartrees
Energy at 0K-188.076186
Energy at 298.15K-188.086237
Nuclear repulsion energy128.939417
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 mPW1PW91/STO-3G
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 3545 3116 0.00      
2 Ag 3363 2956 0.00      
3 Ag 1881 1653 0.00      
4 Ag 1659 1458 0.00      
5 Ag 1527 1342 0.00      
6 Ag 1262 1109 0.00      
7 Ag 1114 979 0.00      
8 Ag 960 844 0.00      
9 Ag 458 403 0.00      
10 Au 3730 3278 23.01      
11 Au 3488 3066 3.09      
12 Au 1536 1350 3.83      
13 Au 1186 1042 2.72      
14 Au 812 714 2.65      
15 Au 300 264 119.29      
16 Au 115 101 0.10      
17 Bg 3730 3278 0.00      
18 Bg 3473 3052 0.00      
19 Bg 1518 1334 0.00      
20 Bg 1424 1252 0.00      
21 Bg 1008 886 0.00      
22 Bg 335 294 0.00      
23 Bu 3544 3114 23.92      
24 Bu 3371 2963 9.40      
25 Bu 1880 1652 12.53      
26 Bu 1677 1474 1.42      
27 Bu 1434 1260 23.46      
28 Bu 1216 1069 25.45      
29 Bu 1018 895 163.39      
30 Bu 276 242 17.83      

Unscaled Zero Point Vibrational Energy (zpe) 26418.4 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 23219.2 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 mPW1PW91/STO-3G
ABC
0.83545 0.12034 0.11358

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.410 0.668 0.000
C2 -0.410 -0.668 0.000
N3 -0.410 1.931 0.000
N4 0.410 -1.931 0.000
H5 1.068 -1.826 0.821
H6 1.068 -1.826 -0.821
H7 -1.068 1.826 0.821
H8 -1.068 1.826 -0.821
H9 -1.061 -0.693 -0.891
H10 -1.061 -0.693 0.891
H11 1.061 0.693 -0.891
H12 1.061 0.693 0.891

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.56791.50562.59962.70702.70702.04872.04872.19312.19311.10391.1039
C21.56792.59961.50562.04872.04872.70702.70701.10391.10392.19312.1931
N31.50562.59963.94864.11994.11991.05741.05742.84652.84652.11952.1195
N42.59961.50563.94861.05741.05744.11994.11992.11952.11952.84652.8465
H52.70702.04874.11991.05741.64234.23024.53782.95762.41283.04522.5194
H62.70702.04874.11991.05741.64234.53784.23022.41282.95762.51943.0452
H72.04872.70701.05744.11994.23024.53781.64233.04522.51942.95762.4128
H82.04872.70701.05744.11994.53784.23021.64232.51943.04522.41282.9576
H92.19311.10392.84652.11952.95762.41283.04522.51941.78162.53463.0981
H102.19311.10392.84652.11952.41282.95762.51943.04521.78163.09812.5346
H111.10392.19312.11952.84653.04522.51942.95762.41282.53463.09811.7816
H121.10392.19312.11952.84652.51943.04522.41282.95763.09812.53461.7816

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 115.501 C1 C2 H9 109.101
C1 C2 H10 109.101 C1 N3 H7 104.774
C1 N3 H8 104.774 C2 C1 N3 115.501
C2 C1 H11 109.101 C2 C1 H12 109.101
C2 N4 H5 104.774 C2 N4 H6 104.774
N3 C1 H11 107.629 N3 C1 H12 107.629
N4 C2 H9 107.629 N4 C2 H10 107.629
H5 N4 H6 101.897 H7 N3 H8 101.897
H9 C2 H10 107.602 H11 C1 H12 107.602
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.089      
2 C -0.089      
3 N -0.369      
4 N -0.369      
5 H 0.153      
6 H 0.153      
7 H 0.153      
8 H 0.153      
9 H 0.076      
10 H 0.076      
11 H 0.076      
12 H 0.076      


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 -21.395 -3.787 0.000
y -3.787 -35.536 0.000
z 0.000 0.000 -22.351
Traceless
 xyz
x 7.549 -3.787 0.000
y -3.787 -13.663 0.000
z 0.000 0.000 6.114
Polar
3z2-r212.229
x2-y214.141
xy-3.787
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.922 -0.713 0.000
y -0.713 2.884 0.000
z 0.000 0.000 3.065


<r2> (average value of r2) Å2
<r2> 108.644
(<r2>)1/2 10.423