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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: PBEPBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at PBEPBE/3-21G*
 hartrees
Energy at 0K-188.002916
Energy at 298.15K 
HF Energy-188.002916
Nuclear repulsion energy116.283756
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 PBEPBE/3-21G*
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 3469 3308 0.31      
2 A 3354 3198 0.20      
3 A 3072 2930 0.16      
4 A 1689 1611 0.22      
5 A 1655 1578 15.38      
6 A 1313 1252 1.94      
7 A 1260 1201 0.02      
8 A 1003 957 0.95      
9 A 903 861 80.55      
10 A 605 577 274.35      
11 A 546 521 9.35      
12 A 360 344 0.76      
13 A 245 234 26.91      
14 B 3468 3307 1.73      
15 B 3351 3195 0.30      
16 B 3079 2935 54.25      
17 B 1658 1581 52.50      
18 B 1366 1302 3.17      
19 B 1166 1112 79.73      
20 B 1111 1059 3.47      
21 B 759 723 16.53      
22 B 532 507 391.80      
23 B 345 329 57.82      
24 B 224 213 184.82      

Unscaled Zero Point Vibrational Energy (zpe) 18265.6 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 17416.3 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 PBEPBE/3-21G*
ABC
1.42030 0.12969 0.12053

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/3-21G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.315 0.600 0.052
C2 -0.315 -0.600 0.052
N3 -0.315 1.863 -0.106
N4 0.315 -1.863 -0.106
H5 1.411 0.640 0.063
H6 -1.411 -0.640 0.063
H7 -1.341 1.829 -0.167
H8 1.341 -1.829 -0.167
H9 0.016 2.602 0.529
H10 -0.016 -2.602 0.529

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.35531.42002.46821.09742.12562.07362.64642.07953.2545
C21.35532.46821.42002.12561.09742.64642.07363.25452.0795
N31.42002.46823.77892.12232.73811.02824.04711.02894.5200
N42.46821.42003.77892.73812.12234.04711.02824.52001.0289
H51.09742.12562.12232.73813.09973.00692.48142.45213.5732
H62.12561.09742.73812.12233.09972.48143.00693.57322.4521
H72.07362.64641.02824.04713.00692.48144.53621.70974.6775
H82.64642.07364.04711.02822.48143.00694.53624.67751.7097
H92.07953.25451.02894.52002.45213.57321.70974.67755.2046
H103.25452.07954.52001.02893.57322.45214.67751.70975.2046

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.566 C1 C2 H6 119.769
C1 N3 H7 114.835 C1 N3 H9 115.318
C2 C1 N3 125.566 C2 C1 H5 119.769
C2 N4 H8 114.835 C2 N4 H10 115.318
N3 C1 H5 114.313 N4 C2 H6 114.313
H7 N3 H9 112.431 H8 N4 H10 112.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.046      
2 C -0.046      
3 N -0.699      
4 N -0.699      
5 H 0.180      
6 H 0.180      
7 H 0.283      
8 H 0.283      
9 H 0.282      
10 H 0.282      


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 2.092 2.092
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.164 -2.483 0.000
y -2.483 -20.111 0.000
z 0.000 0.000 -28.152
Traceless
 xyz
x 3.967 -2.483 0.000
y -2.483 4.047 0.000
z 0.000 0.000 -8.014
Polar
3z2-r2-16.028
x2-y2-0.053
xy-2.483
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.837 0.011 0.000
y 0.011 8.629 0.000
z 0.000 0.000 1.878


<r2> (average value of r2) Å2
<r2> 99.186
(<r2>)1/2 9.959