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

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-96.078190
Energy at 298.15K 
HF Energy-95.648582
Nuclear repulsion energy47.118600
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3115 2951 30.82      
2 A1 2552 2418 68.99      
3 A1 1351 1280 90.38      
4 A1 1135 1075 17.97      
5 A1 844 800 28.72      
6 A2 289 274 0.00      
7 E 3216 3047 7.19      
7 E 3216 3047 7.19      
8 E 1524 1444 605.51      
8 E 1524 1444 605.52      
9 E 1473 1395 1372.62      
9 E 1473 1395 1372.62      
10 E 1233 1168 0.01      
10 E 1233 1168 0.01      
11 E 865 819 2.61      
11 E 865 819 2.61      
12 E 884i 837i 6442.95      
12 E 884i 837i 6442.96      

Unscaled Zero Point Vibrational Energy (zpe) 12068.4 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 11433.6 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 QCISD/6-31G(2df,p)
ABC
2.61554 0.67115 0.67115

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.795
N2 0.000 0.000 0.711
H3 0.000 -1.036 -1.128
H4 -0.897 0.518 -1.128
H5 0.897 0.518 -1.128
H6 0.000 1.028 1.059
H7 -0.891 -0.514 1.059
H8 0.891 -0.514 1.059

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.50571.08851.08841.08842.12052.12052.1205
N21.50572.11052.11052.11051.08601.08601.0860
H31.08852.11051.79501.79503.00782.41862.4186
H41.08842.11051.79501.79502.41862.41863.0078
H51.08842.11051.79501.79502.41863.00782.4186
H62.12051.08603.00782.41862.41861.78141.7814
H72.12051.08602.41862.41863.00781.78141.7814
H82.12051.08602.41863.00782.41861.78141.7814

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 108.728 C1 N2 H7 108.728
C1 N2 H8 108.728 N2 C1 H3 107.803
N2 C1 H4 107.803 N2 C1 H5 107.803
H3 C1 H4 111.086 H3 C1 H5 111.086
H4 C1 H5 111.086 H6 N2 H7 110.204
H6 N2 H8 110.204 H7 N2 H8 110.204
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability