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All results from a given calculation for NH2CH2NH2 (diaminomethane)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-149.403122
Energy at 298.15K-149.411125
HF Energy-149.403122
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy82.920357
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 HF/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 A1 3668 3311 0.02      
2 A1 3244 2928 49.60      
3 A1 1852 1672 43.60      
4 A1 1655 1494 0.97      
5 A1 1121 1012 98.36      
6 A1 788 711 49.85      
7 A1 472 426 0.36      
8 A2 3768 3401 0.00      
9 A2 1531 1382 0.00      
10 A2 1138 1027 0.00      
11 A2 277 250 0.00      
12 B1 3769 3402 0.53      
13 B1 3287 2967 37.49      
14 B1 1464 1322 0.33      
15 B1 896 809 0.17      
16 B1 421 380 116.27      
17 B2 3669 3312 0.46      
18 B2 1841 1662 7.24      
19 B2 1524 1375 7.51      
20 B2 1109 1001 65.92      
21 B2 641 579 603.34      

Unscaled Zero Point Vibrational Energy (zpe) 19067.2 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 17210.0 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 HF/3-21G*
ABC
1.19231 0.29670 0.27043

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.554
N2 0.000 1.259 -0.197
N3 0.000 -1.259 -0.197
H4 0.872 0.000 1.192
H5 -0.872 0.000 1.192
H6 0.830 1.420 -0.739
H7 -0.830 1.420 -0.739
H8 -0.830 -1.420 -0.739
H9 0.830 -1.420 -0.739

Atom - Atom Distances (Å)
  C1 N2 N3 H4 H5 H6 H7 H8 H9
C11.46601.46601.08001.08002.09202.09202.09202.0920
N21.46602.51772.06712.06711.00421.00422.85602.8560
N31.46602.51772.06712.06712.85602.85601.00421.0042
H41.08002.06712.06711.74402.39662.93922.93922.3966
H51.08002.06712.06711.74402.93922.39662.39662.9392
H62.09201.00422.85602.39662.93921.66003.28892.8393
H72.09201.00422.85602.93922.39661.66002.83933.2889
H82.09202.85601.00422.93922.39663.28892.83931.6600
H92.09202.85601.00422.39662.93922.83933.28891.6600

picture of diaminomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 114.457 C1 N2 H7 114.457
C1 N3 H8 114.457 C1 N3 H9 114.457
N2 C1 N3 118.347 N2 C1 H4 107.598
N2 C1 H5 107.598 N3 C1 H4 107.598
N3 C1 H5 107.598 H4 C1 H5 107.687
H6 N2 H7 111.485 H8 N3 H9 111.485
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.000      
2 N -0.807      
3 N -0.807      
4 H 0.227      
5 H 0.227      
6 H 0.290      
7 H 0.290      
8 H 0.290      
9 H 0.290      


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 -16.270 0.000 0.000
y 0.000 -25.156 0.000
z 0.000 0.000 -17.854
Traceless
 xyz
x 5.235 0.000 0.000
y 0.000 -8.094 0.000
z 0.000 0.000 2.859
Polar
3z2-r25.718
x2-y28.886
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.453 0.000 0.000
y 0.000 3.044 0.000
z 0.000 0.000 2.803


<r2> (average value of r2) Å2
<r2> 54.275
(<r2>)1/2 7.367