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**

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**
 hartrees
Energy at 0K-189.220194
Energy at 298.15K 
HF Energy-189.220194
Nuclear repulsion energy116.385103
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**
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 3471 3444 0.00      
2 A 3370 3344 0.00      
3 A 3066 3042 0.11      
4 A 1699 1686 0.19      
5 A 1606 1593 20.23      
6 A 1304 1294 0.71      
7 A 1251 1241 0.04      
8 A 1012 1005 1.33      
9 A 903 896 50.43      
10 A 809 803 124.76      
11 A 539 535 0.63      
12 A 334 332 0.02      
13 A 248 246 17.97      
14 B 3470 3443 2.45      
15 B 3367 3341 7.91      
16 B 3069 3046 58.70      
17 B 1612 1600 31.63      
18 B 1362 1352 10.38      
19 B 1144 1136 65.03      
20 B 1104 1096 1.37      
21 B 762 756 294.71      
22 B 737 731 160.38      
23 B 354 351 51.78      
24 B 259 257 77.86      

Unscaled Zero Point Vibrational Energy (zpe) 18426.0 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 18284.1 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**
ABC
1.40925 0.12984 0.12082

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.315 0.599 0.045
C2 -0.315 -0.599 0.045
N3 -0.315 1.868 -0.121
N4 0.315 -1.868 -0.121
H5 1.410 0.648 0.049
H6 -1.410 -0.648 0.049
H7 -1.335 1.794 -0.055
H8 1.335 -1.794 -0.055
H9 -0.001 2.546 0.582
H10 0.001 -2.546 0.582

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.35271.42712.47271.09682.12882.03972.60312.04463.2054
C21.35272.47271.42712.12881.09682.60312.03973.20542.0446
N31.42712.47273.78962.12002.75031.02474.01761.02584.4812
N42.47271.42713.78962.75032.12004.01761.02474.48121.0258
H51.09682.12882.12002.75033.10482.97662.44612.42433.5319
H62.12881.09682.75032.12003.10482.44612.97663.53192.4243
H72.03972.60311.02474.01762.97662.44614.47251.65824.5856
H82.60312.03974.01761.02472.44612.97664.47254.58561.6582
H92.04463.20541.02584.48122.42433.53191.65824.58565.0917
H103.20542.04464.48121.02583.53192.42434.58561.65825.0917

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.604 C1 C2 H6 120.343
C1 N3 H7 111.540 C1 N3 H9 111.885
C2 C1 N3 125.604 C2 C1 H5 120.343
C2 N4 H8 111.540 C2 N4 H10 111.885
N3 C1 H5 113.626 N4 C2 H6 113.626
H7 N3 H9 107.934 H8 N4 H10 107.934
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.050      
2 C 0.050      
3 N -0.560      
4 N -0.560      
5 H 0.051      
6 H 0.051      
7 H 0.227      
8 H 0.227      
9 H 0.231      
10 H 0.231      


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 2.237 2.237
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.820 -1.880 0.000
y -1.880 -22.451 0.000
z 0.000 0.000 -27.666
Traceless
 xyz
x 4.239 -1.880 0.000
y -1.880 1.792 0.000
z 0.000 0.000 -6.031
Polar
3z2-r2-12.062
x2-y21.631
xy-1.880
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.405 -0.006 0.000
y -0.006 9.012 0.000
z 0.000 0.000 2.786


<r2> (average value of r2) Å2
<r2> 99.226
(<r2>)1/2 9.961