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All results from a given calculation for CH3NH3 (methyl ammonium radical)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-18.440086
Energy at 298.15K 
HF Energy-18.440086
Nuclear repulsion energy30.384766
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/CEP-31G
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 3246 2926 68.43      
2 A1 2605 2348 746.72      
3 A1 1479 1333 44.94      
4 A1 1293 1165 2.46      
5 A1 740 667 73.27      
6 A2 248 224 0.00      
7 E 3347 3017 6.36      
7 E 3347 3017 6.36      
8 E 1620 1461 0.16      
8 E 1620 1461 0.16      
9 E 1404 1266 392.61      
9 E 1404 1266 392.61      
10 E 1254 1131 188.28      
10 E 1254 1131 188.28      
11 E 948 854 29.09      
11 E 948 854 29.09      
12 E 1927i 1737i 15844.61      
12 E 1927i 1737i 15844.61      

Unscaled Zero Point Vibrational Energy (zpe) 11451.9 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 10322.8 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/CEP-31G
ABC
2.69337 0.64695 0.64695

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.811
N2 0.000 0.000 0.723
H3 0.000 -1.027 -1.161
H4 -0.889 0.513 -1.161
H5 0.889 0.513 -1.161
H6 0.000 1.008 1.097
H7 -0.873 -0.504 1.097
H8 0.873 -0.504 1.097

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.53411.08501.08501.08502.15772.15772.1577
N21.53412.14592.14592.14591.07491.07491.0749
H31.08502.14591.77871.77873.03962.47682.4768
H41.08502.14591.77871.77872.47682.47683.0396
H51.08502.14591.77871.77872.47683.03962.4768
H62.15771.07493.03962.47682.47681.74551.7455
H72.15771.07492.47682.47683.03961.74551.7455
H82.15771.07492.47683.03962.47681.74551.7455

picture of methyl ammonium radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 110.354 C1 N2 H7 110.354
C1 N2 H8 110.354 N2 C1 H3 108.829
N2 C1 H4 108.829 N2 C1 H5 108.829
H3 C1 H4 110.105 H3 C1 H5 110.105
H4 C1 H5 110.105 H6 N2 H7 108.574
H6 N2 H8 108.574 H7 N2 H8 108.574
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.597      
2 N -0.014      
3 H 0.162      
4 H 0.162      
5 H 0.162      
6 H 0.042      
7 H 0.042      
8 H 0.042      


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 -0.518 0.518
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.849 0.000 0.000
y 0.000 -16.849 0.000
z 0.000 0.000 -16.963
Traceless
 xyz
x 0.057 0.000 0.000
y 0.000 0.057 0.000
z 0.000 0.000 -0.114
Polar
3z2-r2-0.227
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.232 0.000 0.000
y 0.000 9.232 0.000
z 0.000 0.000 7.319


<r2> (average value of r2) Å2
<r2> 29.658
(<r2>)1/2 5.446