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 CH3NH2 (methyl amine)

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-95.828682
Energy at 298.15K 
HF Energy-95.828682
Nuclear repulsion energy42.023950
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 B3PW91/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3524 3377 1.02      
2 A' 3084 2956 41.19      
3 A' 2974 2850 99.61      
4 A' 1674 1605 21.92      
5 A' 1508 1446 8.48      
6 A' 1468 1407 2.39      
7 A' 1180 1131 6.13      
8 A' 1087 1042 8.94      
9 A' 852 817 176.61      
10 A" 3612 3462 0.00      
11 A" 3127 2997 33.02      
12 A" 1528 1464 2.37      
13 A" 1355 1299 0.18      
14 A" 981 940 0.07      
15 A" 328 314 45.01      

Unscaled Zero Point Vibrational Energy (zpe) 14141.0 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 13552.8 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 B3PW91/6-31G**
ABC
3.44633 0.76329 0.73408

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.051 0.700 0.000
N2 0.051 -0.758 0.000
H3 -0.942 1.183 0.000
H4 0.593 1.062 0.879
H5 0.593 1.062 -0.879
H6 -0.453 -1.103 -0.811
H7 -0.453 -1.103 0.811

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 H6 H7
C11.45751.10391.09491.09492.04022.0402
N21.45752.18002.09282.09281.01541.0154
H31.10392.18001.77301.77302.47492.4749
H41.09492.09281.77301.75872.93962.4058
H51.09492.09281.77301.75872.40582.9396
H62.04021.01542.47492.93962.40581.6225
H72.04021.01542.47492.40582.93961.6225

picture of methyl amine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 H6 109.892 C1 N2 H7 109.892
N2 C1 H3 115.973 N2 C1 H4 109.331
N2 C1 H5 109.331 H3 C1 H4 107.482
H3 C1 H5 107.482 H4 C1 H5 106.856
H6 N2 H7 106.060
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.252      
2 N -0.634      
3 H 0.102      
4 H 0.137      
5 H 0.137      
6 H 0.255      
7 H 0.255      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.402 0.318 0.000 1.438
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.605 2.228 0.000
y 2.228 -13.896 0.000
z 0.000 0.000 -12.393
Traceless
 xyz
x -1.460 2.228 0.000
y 2.228 -0.397 0.000
z 0.000 0.000 1.857
Polar
3z2-r23.714
x2-y2-0.709
xy2.228
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.539 0.144 0.000
y 0.144 3.168 0.000
z 0.000 0.000 2.923


<r2> (average value of r2) Å2
<r2> 26.459
(<r2>)1/2 5.144