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

using model chemistry: ROHF/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 ROHF/3-21G*
 hartrees
Energy at 0K-95.092010
Energy at 298.15K 
HF Energy-95.092010
Nuclear repulsion energy46.566896
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 ROHF/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 3249 2951 18.42      
2 A1 2500 2272 77.51      
3 A1 1486 1350 80.97      
4 A1 1168 1061 0.24      
5 A1 798 725 0.00      
6 A2 275 250 0.00      
7 E 3339 3033 12.83      
7 E 3339 3033 12.83      
8 E 1658 1506 1.59      
8 E 1658 1506 1.59      
9 E 1318 1197 291.06      
9 E 1318 1197 291.07      
10 E 1276 1159 18.66      
10 E 1276 1159 18.66      
11 E 916 832 0.03      
11 E 916 832 0.03      
12 E 2827i 2569i 25254.41      
12 E 2827i 2569i 25254.47      

Unscaled Zero Point Vibrational Energy (zpe) 10416.6 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 9463.4 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 ROHF/3-21G*
ABC
2.60285 0.64727 0.64727

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.815
N2 0.000 0.000 0.726
H3 0.000 -1.027 -1.142
H4 -0.889 0.513 -1.142
H5 0.889 0.513 -1.142
H6 0.000 1.043 1.079
H7 -0.903 -0.522 1.079
H8 0.903 -0.522 1.079

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7 H8
C11.54071.07741.07741.07742.16192.16192.1619
N21.54072.13142.13142.13141.10131.10131.1013
H31.07742.13141.77801.77803.03572.45012.4501
H41.07742.13141.77801.77802.45012.45013.0357
H51.07742.13141.77801.77802.45013.03572.4501
H62.16191.10133.03572.45012.45011.80701.8070
H72.16191.10132.45012.45013.03571.80701.8070
H82.16191.10132.45013.03572.45011.80701.8070

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 108.686 C1 N2 H7 108.686
C1 N2 H8 108.686 N2 C1 H3 107.678
N2 C1 H4 107.678 N2 C1 H5 107.678
H3 C1 H4 111.204 H3 C1 H5 111.204
H4 C1 H5 111.204 H6 N2 H7 110.245
H6 N2 H8 110.245 H7 N2 H8 110.245
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.440      
2 N -0.590      
3 H 0.223      
4 H 0.223      
5 H 0.223      
6 H 0.120      
7 H 0.120      
8 H 0.120      


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 -1.403 1.403
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.395 0.000 0.000
y 0.000 -16.387 0.006
z 0.000 0.006 -16.623
Traceless
 xyz
x 0.110 0.000 0.000
y 0.000 0.122 0.006
z 0.000 0.006 -0.232
Polar
3z2-r2-0.464
x2-y2-0.007
xy0.000
xz0.000
yz0.006


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 31.788
(<r2>)1/2 5.638