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 H2NCHCHNH2 (diaminoethylene)

using model chemistry: PBEPBEultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-189.046433
Energy at 298.15K 
HF Energy-189.046433
Nuclear repulsion energy116.738833
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 PBEPBEultrafine/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 A 3491 3433 0.10      
2 A 3387 3331 0.35      
3 A 3081 3030 0.17      
4 A 1723 1695 0.14      
5 A 1626 1600 25.03      
6 A 1304 1283 0.71      
7 A 1269 1248 0.00      
8 A 1026 1009 1.54      
9 A 898 883 58.65      
10 A 824 810 137.36      
11 A 543 534 1.14      
12 A 339 334 0.01      
13 A 248 244 20.76      
14 B 3490 3432 1.82      
15 B 3384 3328 5.09      
16 B 3083 3032 57.02      
17 B 1635 1608 39.43      
18 B 1366 1343 10.56      
19 B 1180 1160 70.47      
20 B 1109 1090 0.77      
21 B 770 757 396.27      
22 B 736 724 74.87      
23 B 356 350 61.00      
24 B 255 251 80.94      

Unscaled Zero Point Vibrational Energy (zpe) 18560.7 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 18254.4 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 PBEPBEultrafine/6-31G*
ABC
1.41092 0.13089 0.12177

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.313 0.599 0.049
C2 -0.313 -0.599 0.049
N3 -0.313 1.860 -0.123
N4 0.313 -1.860 -0.123
H5 1.411 0.649 0.051
H6 -1.411 -0.649 0.051
H7 -1.334 1.782 -0.066
H8 1.334 -1.782 -0.066
H9 -0.006 2.541 0.581
H10 0.006 -2.541 0.581

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.35201.41822.46471.09892.12842.03122.59322.03823.1991
C21.35202.46471.41822.12841.09892.59322.03123.19912.0382
N31.41822.46473.77192.11422.74361.02493.99741.02574.4675
N42.46471.41823.77192.74362.11423.99741.02494.46751.0257
H51.09892.12842.11422.74363.10602.97192.43502.42243.5249
H62.12841.09892.74362.11423.10602.43502.97193.52492.4224
H72.03122.59321.02493.99742.97192.43504.45201.65994.5717
H82.59322.03123.99741.02492.43502.97194.45204.57171.6599
H92.03823.19911.02574.46752.42243.52491.65994.57175.0811
H103.19912.03824.46751.02573.52492.42244.57171.65995.0811

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.662 C1 C2 H6 120.198
C1 N3 H7 111.470 C1 N3 H9 112.028
C2 C1 N3 125.662 C2 C1 H5 120.198
C2 N4 H8 111.470 C2 N4 H10 112.028
N3 C1 H5 113.668 N4 C2 H6 113.668
H7 N3 H9 108.092 H8 N4 H10 108.092
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.029      
2 C -0.029      
3 N -0.708      
4 N -0.708      
5 H 0.122      
6 H 0.122      
7 H 0.307      
8 H 0.307      
9 H 0.308      
10 H 0.308      


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 2.323 2.323
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.490 -1.972 0.000
y -1.972 -22.201 0.000
z 0.000 0.000 -27.848
Traceless
 xyz
x 4.535 -1.972 0.000
y -1.972 1.967 0.000
z 0.000 0.000 -6.502
Polar
3z2-r2-13.004
x2-y21.712
xy-1.972
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.298 -0.008 0.000
y -0.008 8.923 0.000
z 0.000 0.000 2.729


<r2> (average value of r2) Å2
<r2> 98.534
(<r2>)1/2 9.926