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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: PBEPBE/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 PBEPBE/STO-3G
 hartrees
Energy at 0K-149.061265
Energy at 298.15K-149.069095
HF Energy-149.061265
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy80.098835
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/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 3344 3055 54.78      
2 A1 3261 2979 1.78      
3 A1 1823 1665 4.41      
4 A1 1580 1444 0.23      
5 A1 1226 1120 0.91      
6 A1 880 804 7.72      
7 A1 419 383 15.25      
8 A2 3531 3226 0.00      
9 A2 1466 1340 0.00      
10 A2 1152 1052 0.00      
11 A2 309 282 0.00      
12 B1 3531 3226 45.88      
13 B1 3375 3083 0.09      
14 B1 1469 1342 3.32      
15 B1 868 793 0.17      
16 B1 395 361 105.45      
17 B2 3342 3053 1.90      
18 B2 1819 1662 1.24      
19 B2 1419 1296 16.17      
20 B2 1140 1041 6.39      
21 B2 887 810 208.36      

Unscaled Zero Point Vibrational Energy (zpe) 18616.3 cm-1
Scaled (by 0.9136) Zero Point Vibrational Energy (zpe) 17007.9 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/STO-3G
ABC
1.08689 0.28370 0.25502

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.587
N2 0.000 1.322 -0.182
N3 0.000 -1.322 -0.182
H4 0.905 0.000 1.235
H5 -0.905 0.000 1.235
H6 0.828 1.225 -0.860
H7 -0.828 1.225 -0.860
H8 -0.828 -1.225 -0.860
H9 0.828 -1.225 -0.860

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.52961.52961.11341.11342.06822.06822.06822.0682
N21.52962.64442.13932.13931.07411.07412.76252.7625
N31.52962.64442.13932.13932.76252.76251.07411.0741
H41.11342.13932.13931.80982.42782.98192.98192.4278
H51.11342.13932.13931.80982.98192.42782.42782.9819
H62.06821.07412.76252.42782.98191.65612.95702.4497
H72.06821.07412.76252.98192.42781.65612.44972.9570
H82.06822.76251.07412.98192.42782.95702.44971.6561
H92.06822.76251.07412.42782.98192.44972.95701.6561

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 103.806 C1 N2 H7 103.806
C1 N3 H8 103.806 C1 N3 H9 103.806
N2 C1 N3 119.634 N2 C1 H4 107.032
N2 C1 H5 107.032 N3 C1 H4 107.032
N3 C1 H5 107.032 H4 C1 H5 108.733
H6 N2 H7 100.874 H8 N3 H9 100.874
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.042      
2 N -0.350      
3 N -0.350      
4 H 0.088      
5 H 0.088      
6 H 0.142      
7 H 0.142      
8 H 0.142      
9 H 0.142      


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 -2.035 2.035
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.389 0.000 0.000
y 0.000 -25.514 0.000
z 0.000 0.000 -16.210
Traceless
 xyz
x 4.473 0.000 0.000
y 0.000 -9.215 0.000
z 0.000 0.000 4.741
Polar
3z2-r29.483
x2-y29.125
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.398 0.000 0.000
y 0.000 2.131 0.000
z 0.000 0.000 2.142


<r2> (average value of r2) Å2
<r2> 55.492
(<r2>)1/2 7.449