return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/6-31G**

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/6-31G**
 hartrees
Energy at 0K-95.645708
Energy at 298.15K 
HF Energy-95.645708
Nuclear repulsion energy47.658236
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/6-31G**
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 3230 2915 36.25      
2 A1 2750 2482 45.81      
3 A1 1499 1353 45.81      
4 A1 1244 1123 33.09      
5 A1 971 877 62.97      
6 A2 308 278 0.00      
7 E 3323 2999 11.81      
7 E 3323 2999 11.81      
8 E 1622 1464 11.25      
8 E 1622 1464 11.25      
9 E 1450 1309 1381.63      
9 E 1450 1309 1381.63      
10 E 1350 1218 39.88      
10 E 1350 1218 39.88      
11 E 952 859 8.44      
11 E 952 859 8.44      
12 E 1689i 1524i 19926.83      
12 E 1689i 1524i 19926.83      

Unscaled Zero Point Vibrational Energy (zpe) 12009.2 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 10839.5 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/6-31G**
ABC
2.71240 0.68274 0.68274

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.787
N2 0.000 0.000 0.702
H3 0.000 -1.025 -1.128
H4 -0.887 0.512 -1.128
H5 0.887 0.512 -1.128
H6 0.000 1.003 1.063
H7 -0.869 -0.501 1.063
H8 0.869 -0.501 1.063

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.48831.07991.07991.07992.10442.10442.1044
N21.48832.09692.09692.09691.06621.06621.0662
H31.07992.09691.77461.77462.98532.41442.4144
H41.07992.09691.77461.77462.41442.41442.9853
H51.07992.09691.77461.77462.41442.98532.4144
H62.10441.06622.98532.41442.41441.73711.7371
H72.10441.06622.41442.41442.98531.73711.7371
H82.10441.06622.41442.98532.41441.73711.7371

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 109.832 C1 N2 H7 109.832
C1 N2 H8 109.832 N2 C1 H3 108.419
N2 C1 H4 108.419 N2 C1 H5 108.419
H3 C1 H4 110.503 H3 C1 H5 110.503
H4 C1 H5 110.503 H6 N2 H7 109.108
H6 N2 H8 109.108 H7 N2 H8 109.108
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.197      
2 N -0.256      
3 H 0.132      
4 H 0.132      
5 H 0.132      
6 H 0.019      
7 H 0.019      
8 H 0.019      


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 -1.386 1.386
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.157 0.000 0.000
y 0.000 -17.157 0.000
z 0.000 0.000 -16.856
Traceless
 xyz
x -0.151 0.000 0.000
y 0.000 -0.151 0.000
z 0.000 0.000 0.301
Polar
3z2-r20.603
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 12.241 0.000 0.000
y 0.000 12.241 0.000
z 0.000 0.000 4.709


<r2> (average value of r2) Å2
<r2> 31.188
(<r2>)1/2 5.585