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: BLYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at BLYP/6-31G(2df,p)
 hartrees
Energy at 0K-189.226900
Energy at 298.15K 
HF Energy-189.226900
Nuclear repulsion energy116.568264
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 BLYP/6-31G(2df,p)
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 3466 3447 0.10      
2 A 3374 3355 0.13      
3 A 3060 3043 0.07      
4 A 1692 1683 0.09      
5 A 1601 1593 17.26      
6 A 1303 1296 0.68      
7 A 1252 1245 0.26      
8 A 1009 1004 1.79      
9 A 914 909 45.62      
10 A 812 808 104.00      
11 A 540 537 0.51      
12 A 335 333 0.05      
13 A 250 248 15.26      
14 B 3465 3446 1.42      
15 B 3371 3353 3.56      
16 B 3064 3047 52.13      
17 B 1606 1598 28.85      
18 B 1360 1352 9.77      
19 B 1143 1137 60.12      
20 B 1103 1097 1.49      
21 B 775 771 209.41      
22 B 745 741 217.56      
23 B 355 353 48.14      
24 B 258 257 67.48      

Unscaled Zero Point Vibrational Energy (zpe) 18426.6 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 18325.2 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 BLYP/6-31G(2df,p)
ABC
1.41962 0.13013 0.12109

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.313 0.597 0.043
C2 -0.313 -0.597 0.043
N3 -0.313 1.867 -0.120
N4 0.313 -1.867 -0.120
H5 1.408 0.647 0.047
H6 -1.408 -0.647 0.047
H7 -1.331 1.797 -0.041
H8 1.331 -1.797 -0.041
H9 0.010 2.545 0.576
H10 -0.010 -2.545 0.576

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34781.42582.46871.09552.12362.03792.60242.04213.2024
C21.34782.46871.42582.12361.09552.60242.03793.20242.0421
N31.42582.46873.78572.11612.74691.02314.01681.02374.4761
N42.46871.42583.78572.74692.11614.01681.02314.47611.0237
H51.09552.12362.11612.74693.09882.97182.44722.41503.5323
H62.12361.09552.74692.11613.09882.44722.97183.53232.4150
H72.03792.60241.02314.01682.97182.44724.47281.65474.5799
H82.60242.03794.01681.02312.44722.97184.47284.57991.6547
H92.04213.20241.02374.47612.41503.53231.65474.57995.0891
H103.20242.04214.47611.02373.53232.41504.57991.65475.0891

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.745 C1 C2 H6 120.365
C1 N3 H7 111.589 C1 N3 H9 111.915
C2 C1 N3 125.745 C2 C1 H5 120.365
C2 N4 H8 111.589 C2 N4 H10 111.915
N3 C1 H5 113.482 N4 C2 H6 113.482
H7 N3 H9 107.883 H8 N4 H10 107.883
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.024      
2 C -0.024      
3 N -0.462      
4 N -0.462      
5 H 0.054      
6 H 0.054      
7 H 0.215      
8 H 0.215      
9 H 0.217      
10 H 0.217      


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 2.016 2.016
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.976 -1.615 0.000
y -1.615 -22.437 0.000
z 0.000 0.000 -27.488
Traceless
 xyz
x 3.986 -1.615 0.000
y -1.615 1.795 0.000
z 0.000 0.000 -5.781
Polar
3z2-r2-11.562
x2-y21.460
xy-1.615
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.572 -0.041 0.000
y -0.041 9.138 0.000
z 0.000 0.000 3.235


<r2> (average value of r2) Å2
<r2> 99.020
(<r2>)1/2 9.951