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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-18.473106
Energy at 298.15K 
HF Energy-18.473106
Nuclear repulsion energy30.566515
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 3248 2917 68.44      
2 A1 2617 2350 499.91      
3 A1 1483 1332 18.52      
4 A1 1251 1124 12.54      
5 A1 827 743 16.02      
6 A2 288 259 0.00      
7 E 3333 2993 3.29      
7 E 3333 2993 3.29      
8 E 1613 1449 4.43      
8 E 1613 1449 4.43      
9 E 1416 1271 499.15      
9 E 1416 1271 499.15      
10 E 1275 1145 135.04      
10 E 1275 1145 135.04      
11 E 935 840 0.24      
11 E 935 840 0.24      
12 E 2634i 2365i 22722.00      
12 E 2634i 2365i 22722.00      

Unscaled Zero Point Vibrational Energy (zpe) 10795.0 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 9693.9 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 HF/CEP-31G*
ABC
2.66180 0.66714 0.66714

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 -0.794
N2 0.000 0.000 0.713
H3 0.000 -1.028 -1.146
H4 -0.891 0.514 -1.146
H5 0.891 0.514 -1.146
H6 0.000 1.018 1.071
H7 -0.882 -0.509 1.071
H8 0.882 -0.509 1.071

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.50621.08711.08711.08712.12422.12422.1242
N21.50622.12402.12402.12401.07941.07941.0794
H31.08712.12401.78141.78143.01692.44122.4412
H41.08712.12401.78141.78142.44122.44123.0169
H51.08712.12401.78141.78142.44123.01692.4412
H62.12421.07943.01692.44122.44121.76371.7637
H72.12421.07942.44122.44123.01691.76371.7637
H82.12421.07942.44123.01692.44121.76371.7637

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 109.372 C1 N2 H7 109.372
C1 N2 H8 109.372 N2 C1 H3 108.900
N2 C1 H4 108.900 N2 C1 H5 108.900
H3 C1 H4 110.037 H3 C1 H5 110.037
H4 C1 H5 110.037 H6 N2 H7 109.571
H6 N2 H8 109.571 H7 N2 H8 109.571
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 -0.610      
2 N -0.013      
3 H 0.163      
4 H 0.163      
5 H 0.163      
6 H 0.045      
7 H 0.045      
8 H 0.045      


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 -0.618 0.618
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.830 0.000 0.000
y 0.000 -16.830 0.000
z 0.000 0.000 -16.721
Traceless
 xyz
x -0.055 0.000 0.000
y 0.000 -0.055 0.000
z 0.000 0.000 0.109
Polar
3z2-r20.218
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 10.110 0.000 0.000
y 0.000 10.110 0.000
z 0.000 0.000 6.431


<r2> (average value of r2) Å2
<r2> 29.208
(<r2>)1/2 5.404