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: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-189.216973
Energy at 298.15K 
HF Energy-189.216973
Nuclear repulsion energy117.477442
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 B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3608 3452 0.50      
2 A 3506 3354 1.66      
3 A 3165 3028 0.14      
4 A 1785 1708 0.11      
5 A 1678 1606 27.72      
6 A 1347 1289 0.70      
7 A 1302 1246 0.01      
8 A 1053 1008 1.05      
9 A 944 903 59.87      
10 A 838 802 163.10      
11 A 557 533 1.41      
12 A 339 324 0.02      
13 A 255 244 20.92      
14 B 3608 3451 1.79      
15 B 3505 3353 0.33      
16 B 3167 3030 56.07      
17 B 1687 1614 49.83      
18 B 1408 1347 9.10      
19 B 1205 1153 87.82      
20 B 1140 1090 0.80      
21 B 810 775 205.14      
22 B 761 728 271.03      
23 B 353 338 53.63      
24 B 256 245 99.54      

Unscaled Zero Point Vibrational Energy (zpe) 19138.3 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18309.6 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 B3PW91/6-31G*
ABC
1.43859 0.13231 0.12306

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.312 0.593 0.038
C2 -0.312 -0.593 0.038
N3 -0.312 1.851 -0.112
N4 0.312 -1.851 -0.112
H5 1.401 0.641 0.038
H6 -1.401 -0.641 0.038
H7 -1.324 1.783 -0.065
H8 1.324 -1.783 -0.065
H9 -0.000 2.521 0.585
H10 0.000 -2.521 0.585

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34051.41162.44901.09062.11142.02462.58462.02813.1777
C21.34052.44901.41162.11141.09062.58462.02463.17772.0281
N31.41162.44903.75402.10222.72421.01553.98481.01624.4386
N42.44901.41163.75402.72422.10223.98481.01554.43861.0162
H51.09062.11142.10222.72423.08182.95592.42732.40763.5020
H62.11141.09062.72422.10223.08182.42732.95593.50202.4076
H72.02462.58461.01553.98482.95592.42734.44051.64944.5497
H82.58462.02463.98481.01552.42732.95594.44054.54971.6494
H92.02813.17771.01624.43862.40763.50201.64944.54975.0429
H103.17772.02814.43861.01623.50202.40764.54971.64945.0429

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.699 C1 C2 H6 120.223
C1 N3 H7 112.027 C1 N3 H9 112.287
C2 C1 N3 125.699 C2 C1 H5 120.223
C2 N4 H8 112.027 C2 N4 H10 112.287
N3 C1 H5 113.698 N4 C2 H6 113.698
H7 N3 H9 108.552 H8 N4 H10 108.552
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.032      
2 C -0.032      
3 N -0.760      
4 N -0.760      
5 H 0.144      
6 H 0.144      
7 H 0.324      
8 H 0.324      
9 H 0.325      
10 H 0.325      


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 2.407 2.407
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.183 -1.888 0.000
y -1.888 -22.439 0.000
z 0.000 0.000 -27.711
Traceless
 xyz
x 4.893 -1.888 0.000
y -1.888 1.507 0.000
z 0.000 0.000 -6.400
Polar
3z2-r2-12.800
x2-y22.257
xy-1.888
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.104 0.102 0.000
y 0.102 8.450 0.000
z 0.000 0.000 2.658


<r2> (average value of r2) Å2
<r2> 97.570
(<r2>)1/2 9.878