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: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-169.724264
Energy at 298.15K-169.727977
HF Energy-169.724264
Nuclear repulsion energy70.631794
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 B1B95/6-31G*
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' 3194 3032 10.61      
2 A' 3071 2916 1.40      
3 A' 1741 1653 71.51      
4 A' 1483 1408 21.78      
5 A' 1394 1323 22.26      
6 A' 1176 1116 15.15      
7 A' 876 832 21.32      
8 A' 581 552 2.09      
9 A" 3163 3002 3.56      
10 A" 1479 1404 11.34      
11 A" 978 928 1.13      
12 A" 171 163 2.22      

Unscaled Zero Point Vibrational Energy (zpe) 9653.1 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 9163.7 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 B1B95/6-31G*
ABC
2.04441 0.38735 0.34659

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.941 -0.565 0.000
N2 0.000 0.571 0.000
O3 1.152 0.228 0.000
H4 -0.414 -1.521 0.000
H5 -1.579 -0.452 0.881
H6 -1.579 -0.452 -0.881

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.47542.23891.09121.09341.0934
N21.47541.20252.13222.07752.0775
O32.23891.20252.34752.94942.9494
H41.09122.13222.34751.80961.8096
H51.09342.07752.94941.80961.7617
H61.09342.07752.94941.80961.7617

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 113.051 N2 C1 H4 111.472
N2 C1 H5 107.005 N2 C1 H6 107.005
H4 C1 H5 111.864 H4 C1 H6 111.864
H5 C1 H6 107.341
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.393      
2 N 0.062      
3 O -0.259      
4 H 0.187      
5 H 0.201      
6 H 0.201      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.974 -1.328 0.000 2.379
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.867 0.331 0.000
y 0.331 -18.737 0.000
z 0.000 0.000 -16.363
Traceless
 xyz
x -0.317 0.331 0.000
y 0.331 -1.622 0.000
z 0.000 0.000 1.939
Polar
3z2-r23.878
x2-y20.870
xy0.331
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.126 0.296 0.000
y 0.296 2.779 0.000
z 0.000 0.000 2.385


<r2> (average value of r2) Å2
<r2> 41.014
(<r2>)1/2 6.404