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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-149.411133
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 3322 0.02      
2 A1 3244 2938 49.60      
3 A1 1852 1677 43.60      
4 A1 1655 1499 0.97      
5 A1 1121 1016 98.36      
6 A1 788 714 49.85      
7 A1 472 427 0.36      
8 A2 3768 3412 0.00      
9 A2 1531 1387 0.00      
10 A2 1138 1030 0.00      
11 A2 277 251 0.00      
12 B1 3769 3413 0.53      
13 B1 3287 2977 37.49      
14 B1 1464 1326 0.33      
15 B1 896 812 0.17      
16 B1 421 381 116.27      
17 B2 3669 3323 0.46      
18 B2 1841 1667 7.24      
19 B2 1524 1380 7.51      
20 B2 1109 1004 65.92      
21 B2 641 581 603.34      

Unscaled Zero Point Vibrational Energy (zpe) 19067.2 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 17267.2 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