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 CH3NO (nitrosomethane)

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-169.750994
Energy at 298.15K-169.754706
HF Energy-169.750994
Nuclear repulsion energy70.560249
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 mPW1PW91/6-31G**
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' 3187 3033 10.33      
2 A' 3061 2913 1.48      
3 A' 1736 1652 73.05      
4 A' 1468 1396 21.54      
5 A' 1383 1316 23.72      
6 A' 1169 1113 15.38      
7 A' 873 831 22.68      
8 A' 580 552 2.05      
9 A" 3157 3004 3.13      
10 A" 1467 1396 11.89      
11 A" 970 923 0.99      
12 A" 170 162 2.34      

Unscaled Zero Point Vibrational Energy (zpe) 9610.4 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 9144.3 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 mPW1PW91/6-31G**
ABC
2.04631 0.38608 0.34560

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.942 -0.567 0.000
N2 0.000 0.571 0.000
O3 1.154 0.230 0.000
H4 -0.418 -1.524 0.000
H5 -1.581 -0.453 0.880
H6 -1.581 -0.453 -0.880

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.47682.24251.09171.09381.0938
N21.47681.20352.13592.07912.0791
O32.24251.20352.35512.95362.9536
H41.09172.13592.35511.81021.8102
H51.09382.07912.95361.81021.7604
H61.09382.07912.95361.81021.7604

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 113.185 N2 C1 H4 111.646
N2 C1 H5 107.013 N2 C1 H6 107.013
H4 C1 H5 111.849 H4 C1 H6 111.849
H5 C1 H6 107.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.290      
2 N 0.052      
3 O -0.259      
4 H 0.155      
5 H 0.171      
6 H 0.171      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.991 -1.352 0.000 2.407
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.844 0.349 0.000
y 0.349 -18.740 0.000
z 0.000 0.000 -16.370
Traceless
 xyz
x -0.289 0.349 0.000
y 0.349 -1.633 0.000
z 0.000 0.000 1.922
Polar
3z2-r23.844
x2-y20.896
xy0.349
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.174 0.307 0.000
y 0.307 2.822 0.000
z 0.000 0.000 2.416


<r2> (average value of r2) Å2
<r2> 41.094
(<r2>)1/2 6.410