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: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-95.765881
Energy at 298.15K 
HF Energy-95.765881
Nuclear repulsion energy46.020953
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 mPW1PW91/3-21G*
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 3099 2943 30.09      
2 A1 2301 2185 118.18      
3 A1 1318 1251 178.46      
4 A1 1066 1013 0.80      
5 A1 687 653 6.22      
6 A2 252 239 0.00      
7 E 3202 3041 15.46      
7 E 3202 3041 15.45      
8 E 1530 1453 0.36      
8 E 1530 1453 0.36      
9 E 1360 1291 759.66      
9 E 1360 1291 759.74      
10 E 1155 1096 20.08      
10 E 1155 1096 20.07      
11 E 834 792 10.75      
11 E 834 792 10.75      
12 E 1258i 1195i 5021.68      
12 E 1258i 1195i 5022.23      

Unscaled Zero Point Vibrational Energy (zpe) 11183.7 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 10620.0 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 mPW1PW91/3-21G*
ABC
2.48010 0.63993 0.63993

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.820
N2 0.000 0.000 0.733
H3 0.000 -1.042 -1.138
H4 -0.902 0.521 -1.138
H5 0.902 0.521 -1.138
H6 0.000 1.078 1.066
H7 -0.934 -0.539 1.066
H8 0.934 -0.539 1.066

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.55281.08961.08961.08962.17252.17252.1725
N21.55282.14212.14212.14211.12851.12851.1285
H31.08962.14211.80471.80473.05882.44662.4466
H41.08962.14211.80471.80472.44662.44663.0588
H51.08962.14211.80471.80472.44663.05882.4466
H62.17251.12853.05882.44662.44661.86741.8674
H72.17251.12852.44662.44663.05881.86741.8674
H82.17251.12852.44663.05882.44661.86741.8674

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 107.175 C1 N2 H7 107.175
C1 N2 H8 107.175 N2 C1 H3 107.011
N2 C1 H4 107.011 N2 C1 H5 107.011
H3 C1 H4 111.815 H3 C1 H5 111.815
H4 C1 H5 111.815 H6 N2 H7 111.666
H6 N2 H8 111.666 H7 N2 H8 111.666
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.527      
2 N -0.515      
3 H 0.229      
4 H 0.229      
5 H 0.229      
6 H 0.118      
7 H 0.118      
8 H 0.118      


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 -1.006 1.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.026 0.000 0.000
y 0.000 -16.026 0.000
z 0.000 0.000 -16.331
Traceless
 xyz
x 0.153 0.000 0.000
y 0.000 0.153 0.000
z 0.000 0.000 -0.305
Polar
3z2-r2-0.610
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 6.950 0.000 0.000
y 0.000 6.950 0.000
z 0.000 0.000 4.752


<r2> (average value of r2) Å2
<r2> 31.911
(<r2>)1/2 5.649