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All results from a given calculation for H2NCHCHNH2 (diaminoethylene)

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G
 hartrees
Energy at 0K-188.019606
Energy at 298.15K 
HF Energy-188.019606
Nuclear repulsion energy117.267257
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 PBE1PBE/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 3628 3485 2.17      
2 A 3514 3375 1.73      
3 A 3169 3044 0.15      
4 A 1765 1695 0.74      
5 A 1707 1640 14.69      
6 A 1360 1306 1.87      
7 A 1294 1243 0.01      
8 A 1030 989 0.46      
9 A 957 919 88.81      
10 A 587 564 221.03      
11 A 554 533 145.88      
12 A 355 341 6.29      
13 A 249 239 27.80      
14 B 3628 3484 5.42      
15 B 3511 3372 5.89      
16 B 3175 3049 49.73      
17 B 1710 1642 75.19      
18 B 1409 1353 3.03      
19 B 1199 1152 114.95      
20 B 1135 1090 5.01      
21 B 823 790 21.12      
22 B 503 483 340.85      
23 B 340 326 30.31      
24 B 193 185 242.61      

Unscaled Zero Point Vibrational Energy (zpe) 18897.7 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 18149.4 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 PBE1PBE/3-21G
ABC
1.45853 0.13165 0.12227

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.313 0.593 0.043
C2 -0.313 -0.593 0.043
N3 -0.313 1.849 -0.091
N4 0.313 -1.849 -0.091
H5 1.401 0.630 0.052
H6 -1.401 -0.630 0.052
H7 -1.324 1.838 -0.187
H8 1.324 -1.838 -0.187
H9 0.032 2.590 0.513
H10 -0.032 -2.590 0.513

Atom - Atom Distances (Å)
  C1 C2 N3 N4 H5 H6 H7 H8 H9 H10
C11.34101.40902.44551.08882.10542.06882.64282.07073.2363
C21.34102.44551.40902.10541.08882.64282.06883.23632.0707
N31.40902.44553.75002.10722.71111.01594.03451.01614.4885
N42.44551.40903.75002.71112.10724.03451.01594.48851.0161
H51.08882.10542.10722.71113.07202.98972.48082.43443.5548
H62.10541.08882.71112.10723.07202.48082.98973.55482.4344
H72.06882.64281.01594.03452.98972.48084.52981.70134.6653
H82.64282.06884.03451.01592.48082.98974.52984.66531.7013
H92.07073.23631.01614.48852.43443.55481.70134.66535.1807
H103.23632.07074.48851.01613.55482.43444.66531.70135.1807

picture of diaminoethylene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N4 125.551 C1 C2 H6 119.747
C1 N3 H7 116.169 C1 N3 H9 116.335
C2 C1 N3 125.551 C2 C1 H5 119.747
C2 N4 H8 116.169 C2 N4 H10 116.335
N3 C1 H5 114.450 N4 C2 H6 114.450
H7 N3 H9 113.705 H8 N4 H10 113.705
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.034      
2 C -0.034      
3 N -0.770      
4 N -0.770      
5 H 0.202      
6 H 0.202      
7 H 0.301      
8 H 0.301      
9 H 0.301      
10 H 0.301      


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 -19.951 -2.305 0.000
y -2.305 -20.057 0.000
z 0.000 0.000 -28.123
Traceless
 xyz
x 4.139 -2.305 0.000
y -2.305 3.980 0.000
z 0.000 0.000 -8.119
Polar
3z2-r2-16.239
x2-y20.106
xy-2.305
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.625 0.151 0.000
y 0.151 8.074 0.000
z 0.000 0.000 1.768


<r2> (average value of r2) Å2
<r2> 97.934
(<r2>)1/2 9.896