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: B3PW91/daug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/daug-cc-pVDZ
 hartrees
Energy at 0K-189.259221
Energy at 298.15K 
HF Energy-189.259221
Nuclear repulsion energy117.368132
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/daug-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 A 3616 3616 1.87      
2 A 3516 3516 0.08      
3 A 3156 3156 0.06      
4 A 1761 1761 0.55      
5 A 1623 1623 18.26      
6 A 1324 1324 0.38      
7 A 1278 1278 0.01      
8 A 1031 1031 0.03      
9 A 927 927 67.28      
10 A 775 775 128.32      
11 A 551 551 1.89      
12 A 324 324 3.85      
13 A 242 242 14.80      
14 B 3616 3616 7.48      
15 B 3514 3514 2.54      
16 B 3160 3160 46.06      
17 B 1631 1631 52.01      
18 B 1380 1380 10.38      
19 B 1184 1184 129.43      
20 B 1115 1115 1.31      
21 B 813 813 55.18      
22 B 719 719 295.63      
23 B 341 341 33.41      
24 B 246 246 93.86      

Unscaled Zero Point Vibrational Energy (zpe) 18920.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18920.2 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 B3PW91/daug-cc-pVDZ
ABC
1.43811 0.13216 0.12276

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/daug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.313 0.594 0.036
C2 -0.313 -0.594 0.036
N3 -0.313 1.851 -0.110
N4 0.313 -1.851 -0.110
H5 1.406 0.639 0.037
H6 -1.406 -0.639 0.037
H7 -1.324 1.795 -0.042
H8 1.324 -1.795 -0.042
H9 0.025 2.537 0.558
H10 -0.025 -2.537 0.558

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34231.41222.44891.09342.11482.03232.59472.03323.1921
C21.34232.44891.41222.11481.09342.59472.03233.19212.0332
N31.41222.44893.75462.10852.72261.01513.99711.01534.4481
N42.44891.41223.75462.72262.10853.99711.01514.44811.0153
H51.09342.11482.10852.72263.08782.96582.43582.40503.5218
H62.11481.09342.72262.10853.08782.43582.96583.52182.4050
H72.03232.59471.01513.99712.96582.43584.46091.65254.5623
H82.59472.03233.99711.01512.43582.96584.46094.56231.6525
H92.03323.19211.01534.44812.40503.52181.65254.56235.0748
H103.19212.03324.44811.01533.52182.40504.56231.65255.0748

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.490 C1 C2 H6 120.168
C1 N3 H7 112.676 C1 N3 H9 112.746
C2 C1 N3 125.490 C2 C1 H5 120.168
C2 N4 H8 112.676 C2 N4 H10 112.746
N3 C1 H5 113.994 N4 C2 H6 113.994
H7 N3 H9 108.953 H8 N4 H10 108.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.424      
2 C 0.424      
3 N 0.410      
4 N 0.410      
5 H -0.771      
6 H -0.771      
7 H -0.078      
8 H -0.078      
9 H 0.015      
10 H 0.015      


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 2.014 2.014
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.952 -1.336 0.000
y -1.336 -23.242 0.000
z 0.000 0.000 -28.810
Traceless
 xyz
x 5.074 -1.336 0.000
y -1.336 1.639 0.000
z 0.000 0.000 -6.713
Polar
3z2-r2-13.425
x2-y22.290
xy-1.336
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.394 -0.041 0.000
y -0.041 10.326 0.000
z 0.000 0.000 5.329


<r2> (average value of r2) Å2
<r2> 98.349
(<r2>)1/2 9.917