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: 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-169.728130
Energy at 298.15K-169.731828
HF Energy-169.728130
Nuclear repulsion energy70.352309
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' 3172 3034 11.92      
2 A' 3051 2919 1.58      
3 A' 1711 1637 71.20      
4 A' 1476 1412 22.75      
5 A' 1386 1326 24.37      
6 A' 1166 1116 15.61      
7 A' 859 821 24.81      
8 A' 576 551 1.65      
9 A" 3140 3004 3.84      
10 A" 1473 1409 11.75      
11 A" 971 929 0.93      
12 A" 169 161 2.43      

Unscaled Zero Point Vibrational Energy (zpe) 9574.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 9159.9 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
2.03538 0.38364 0.34347

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 -0.945 -0.569 0.000
N2 0.000 0.572 0.000
O3 1.158 0.231 0.000
H4 -0.420 -1.529 0.000
H5 -1.585 -0.454 0.883
H6 -1.585 -0.454 -0.883

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.48172.24991.09411.09641.0964
N21.48171.20702.14252.08412.0841
O32.24991.20702.36352.96152.9615
H41.09412.14252.36351.81451.8145
H51.09642.08412.96151.81451.7658
H61.09642.08412.96151.81451.7658

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 113.217 N2 C1 H4 111.681
N2 C1 H5 106.927 N2 C1 H6 106.927
H4 C1 H5 111.864 H4 C1 H6 111.864
H5 C1 H6 107.272
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.413      
2 N 0.062      
3 O -0.256      
4 H 0.192      
5 H 0.207      
6 H 0.207      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.975 -1.340 0.000 2.387
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.863 0.333 0.000
y 0.333 -18.764 0.000
z 0.000 0.000 -16.374
Traceless
 xyz
x -0.294 0.333 0.000
y 0.333 -1.645 0.000
z 0.000 0.000 1.939
Polar
3z2-r23.878
x2-y20.901
xy0.333
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.178 0.318 0.000
y 0.318 2.819 0.000
z 0.000 0.000 2.402


<r2> (average value of r2) Å2
<r2> 41.286
(<r2>)1/2 6.425