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: MP2=FULL/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at MP2=FULL/cc-pVQZ
 hartrees
Energy at 0K-96.240594
Energy at 298.15K-96.247798
HF Energy-95.733420
Nuclear repulsion energy47.865339
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 MP2=FULL/cc-pVQZ
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 3120 2986 63.35      
2 A1 2945 2818 6.44      
3 A1 1402 1342 31.99      
4 A1 1287 1231 324.84      
5 A1 975 933 44.28      
6 A2 332 318 0.00      
7 E 3233 3095 3.13      
7 E 3233 3095 3.13      
8 E 2760 2641 2077.70      
8 E 2760 2641 2077.70      
9 E 1509 1444 0.01      
9 E 1509 1444 0.01      
10 E 1449 1386 5.80      
10 E 1449 1386 5.80      
11 E 1241 1188 8.26      
11 E 1241 1188 8.26      
12 E 881 844 87.70      
12 E 881 844 87.70      

Unscaled Zero Point Vibrational Energy (zpe) 16103.4 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 15412.5 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 MP2=FULL/cc-pVQZ
ABC
2.77186 0.68272 0.68272

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVQZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.791
N2 0.000 0.000 0.699
H3 0.000 -1.028 -1.123
H4 -0.891 0.514 -1.123
H5 0.891 0.514 -1.123
H6 0.000 0.977 1.074
H7 -0.846 -0.488 1.074
H8 0.846 -0.488 1.074

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.48991.08081.08081.08082.10522.10522.1052
N21.48992.09252.09252.09251.04621.04621.0462
H31.08082.09251.78141.78142.97472.41572.4157
H41.08082.09251.78141.78142.41572.41572.9747
H51.08082.09251.78141.78142.41572.97472.4157
H62.10521.04622.97472.41572.41571.69151.6915
H72.10521.04622.41572.41572.97471.69151.6915
H82.10521.04622.41572.97472.41571.69151.6915

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 111.012 C1 N2 H7 111.012
C1 N2 H8 111.012 N2 C1 H3 107.909
N2 C1 H4 107.909 N2 C1 H5 107.909
H3 C1 H4 110.987 H3 C1 H5 110.987
H4 C1 H5 110.987 H6 N2 H7 107.888
H6 N2 H8 107.888 H7 N2 H8 107.888
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability