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: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-169.759742
Energy at 298.15K-169.763461
HF Energy-169.759742
Nuclear repulsion energy70.617894
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 mPW1PW91/6-31+G**
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' 3182 3029 9.72      
2 A' 3057 2910 1.65      
3 A' 1727 1644 93.57      
4 A' 1461 1391 28.12      
5 A' 1383 1317 32.28      
6 A' 1170 1113 17.31      
7 A' 885 842 24.07      
8 A' 582 554 1.99      
9 A" 3154 3002 1.29      
10 A" 1457 1387 16.44      
11 A" 975 928 2.08      
12 A" 170 161 1.74      

Unscaled Zero Point Vibrational Energy (zpe) 9601.9 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 9139.1 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 mPW1PW91/6-31+G**
ABC
2.06758 0.38554 0.34578

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.943 -0.565 0.000
N2 0.000 0.565 0.000
O3 1.156 0.232 0.000
H4 -0.425 -1.527 0.000
H5 -1.581 -0.444 0.881
H6 -1.581 -0.444 -0.881

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.47202.24481.09221.09401.0940
N21.47201.20272.13492.07182.0718
O32.24481.20272.36502.95292.9529
H41.09222.13492.36501.81211.8121
H51.09402.07182.95291.81211.7611
H61.09402.07182.95291.81211.7611

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 113.751 N2 C1 H4 111.876
N2 C1 H5 106.752 N2 C1 H6 106.752
H4 C1 H5 111.963 H4 C1 H6 111.963
H5 C1 H6 107.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.474      
2 N -0.024      
3 O -0.084      
4 H 0.191      
5 H 0.196      
6 H 0.196      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.139 -1.471 0.000 2.596
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.434 0.465 0.000
y 0.465 -19.409 0.000
z 0.000 0.000 -16.739
Traceless
 xyz
x -0.360 0.465 0.000
y 0.465 -1.823 0.000
z 0.000 0.000 2.183
Polar
3z2-r24.365
x2-y20.975
xy0.465
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.867 0.298 0.000
y 0.298 3.539 0.000
z 0.000 0.000 2.855


<r2> (average value of r2) Å2
<r2> 41.420
(<r2>)1/2 6.436