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: PBEPBE/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at PBEPBE/aug-cc-pVTZ
 hartrees
Energy at 0K-190.347908
Energy at 298.15K-190.357899
Nuclear repulsion energy130.956303
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 PBEPBE/aug-cc-pVTZ
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 3399 3377 0.00      
2 Ag 2936 2917 0.00      
3 Ag 1607 1596 0.00      
4 Ag 1424 1415 0.00      
5 Ag 1336 1328 0.00      
6 Ag 1079 1072 0.00      
7 Ag 1015 1008 0.00      
8 Ag 783 778 0.00      
9 Ag 441 438 0.00      
10 Au 3477 3454 0.71      
11 Au 2993 2973 59.62      
12 Au 1346 1337 1.48      
13 Au 1040 1033 0.27      
14 Au 731 726 0.88      
15 Au 235 233 87.62      
16 Au 138 137 0.40      
17 Bg 3477 3455 0.00      
18 Bg 2964 2945 0.00      
19 Bg 1326 1318 0.00      
20 Bg 1255 1247 0.00      
21 Bg 909 903 0.00      
22 Bg 272 270 0.00      
23 Bu 3398 3376 6.02      
24 Bu 2946 2927 84.59      
25 Bu 1606 1596 40.57      
26 Bu 1443 1433 1.05      
27 Bu 1279 1270 12.94      
28 Bu 1053 1046 20.95      
29 Bu 818 812 335.28      
30 Bu 256 254 17.56      

Unscaled Zero Point Vibrational Energy (zpe) 23489.3 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 23336.6 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 PBEPBE/aug-cc-pVTZ
ABC
0.87553 0.12327 0.11679

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-cc-pVTZ

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 1.893 0.000
N4 0.397 -1.893 0.000
H5 1.008 -1.923 0.818
H6 1.008 -1.923 -0.818
H7 -1.008 1.923 0.818
H8 -1.008 1.923 -0.818
H9 -1.060 -0.681 -0.881
H10 -1.060 -0.681 0.881
H11 1.060 0.681 -0.881
H12 1.060 0.681 0.881

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10 H11 H12
C11.54001.46582.55262.77762.77762.05872.05872.16682.16681.10311.1031
C21.54002.55261.46582.05872.05872.77762.77761.10311.10312.16682.1668
N31.46582.55263.86734.14744.14741.02191.02192.79972.79972.08952.0895
N42.55261.46583.86731.02191.02194.14744.14742.08952.08952.79972.7997
H52.77762.05874.14741.02191.63644.34244.64052.95092.41313.10972.6049
H62.77762.05874.14741.02191.63644.64054.34242.41312.95092.60493.1097
H72.05872.77761.02194.14744.34244.64051.63643.10972.60492.95092.4131
H82.05872.77761.02194.14744.64054.34241.63642.60493.10972.41312.9509
H92.16681.10312.79972.08952.95092.41313.10972.60491.76292.51883.0745
H102.16681.10312.79972.08952.41312.95092.60493.10971.76293.07452.5188
H111.10312.16682.08952.79973.10972.60492.95092.41312.51883.07451.7629
H121.10312.16682.08952.79972.60493.10972.41312.95093.07452.51881.7629

picture of Ethylenediamine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 116.228 C1 C2 H9 109.006
C1 C2 H10 109.006 C1 N3 H7 110.418
C1 N3 H8 110.418 C2 C1 N3 116.228
C2 C1 H11 109.006 C2 C1 H12 109.006
C2 N4 H5 110.418 C2 N4 H6 110.418
N3 C1 H11 108.027 N3 C1 H12 108.027
N4 C2 H9 108.027 N4 C2 H10 108.027
H5 N4 H6 106.376 H7 N3 H8 106.376
H9 C2 H10 106.079 H11 C1 H12 106.079
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.044      
2 C -0.044      
3 N -0.422      
4 N -0.422      
5 H 0.046      
6 H 0.046      
7 H 0.046      
8 H 0.046      
9 H 0.188      
10 H 0.188      
11 H 0.188      
12 H 0.188      


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 -25.148 -4.540 0.000
y -4.540 -36.232 0.000
z 0.000 0.000 -23.975
Traceless
 xyz
x 4.955 -4.540 0.000
y -4.540 -11.670 0.000
z 0.000 0.000 6.715
Polar
3z2-r213.430
x2-y211.084
xy-4.540
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.527 -0.379 0.000
y -0.379 8.656 0.000
z 0.000 0.000 6.650


<r2> (average value of r2) Å2
<r2> 108.219
(<r2>)1/2 10.403