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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: LSDA/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at LSDA/STO-3G
 hartrees
Energy at 0K-148.439169
Energy at 298.15K-148.446985
HF Energy-148.439169
Nuclear repulsion energy81.166241
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 LSDA/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3444 3084 30.67      
2 A1 3306 2961 1.79      
3 A1 1819 1629 9.87      
4 A1 1575 1410 1.63      
5 A1 1194 1070 5.66      
6 A1 868 778 2.57      
7 A1 422 378 15.01      
8 A2 3634 3255 0.00      
9 A2 1466 1312 0.00      
10 A2 1154 1033 0.00      
11 A2 311 279 0.00      
12 B1 3633 3253 20.56      
13 B1 3419 3062 0.14      
14 B1 1467 1313 3.15      
15 B1 871 780 0.03      
16 B1 403 361 117.52      
17 B2 3443 3083 1.70      
18 B2 1814 1624 0.28      
19 B2 1420 1272 10.02      
20 B2 1156 1035 0.22      
21 B2 821 735 301.94      

Unscaled Zero Point Vibrational Energy (zpe) 18819.0 cm-1
Scaled (by 0.8955) Zero Point Vibrational Energy (zpe) 16852.4 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 LSDA/STO-3G
ABC
1.10612 0.29319 0.26376

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.579
N2 0.000 1.295 -0.182
N3 0.000 -1.295 -0.182
H4 0.900 0.000 1.225
H5 -0.900 0.000 1.225
H6 0.830 1.231 -0.844
H7 -0.830 1.231 -0.844
H8 -0.830 -1.231 -0.844
H9 0.830 -1.231 -0.844

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.50211.50211.10831.10832.05632.05632.05632.0563
N21.50212.59032.11392.11391.06361.06362.74012.7401
N31.50212.59032.11392.11392.74012.74011.06361.0636
H41.10832.11392.11391.80042.40872.96502.96502.4087
H51.10832.11392.11391.80042.96502.40872.40872.9650
H62.05631.06362.74012.40872.96501.66042.96952.4619
H72.05631.06362.74012.96502.40871.66042.46192.9695
H82.05632.74011.06362.96502.40872.96952.46191.6604
H92.05632.74011.06362.40872.96502.46192.96951.6604

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 105.255 C1 N2 H7 105.255
C1 N3 H8 105.255 C1 N3 H9 105.255
N2 C1 N3 119.127 N2 C1 H4 107.189
N2 C1 H5 107.189 N3 C1 H4 107.189
N3 C1 H5 107.189 H4 C1 H5 108.625
H6 N2 H7 102.629 H8 N3 H9 102.629
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.071      
2 N -0.383      
3 N -0.383      
4 H 0.104      
5 H 0.104      
6 H 0.158      
7 H 0.158      
8 H 0.158      
9 H 0.158      


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 -2.147 2.147
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.982 0.000 0.000
y 0.000 -25.276 0.000
z 0.000 0.000 -15.970
Traceless
 xyz
x 4.641 0.000 0.000
y 0.000 -9.300 0.000
z 0.000 0.000 4.659
Polar
3z2-r29.318
x2-y29.294
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.323 0.000 0.000
y 0.000 2.014 0.000
z 0.000 0.000 2.017


<r2> (average value of r2) Å2
<r2> 54.162
(<r2>)1/2 7.359