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: B2PLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/3-21G
 hartrees
Energy at 0K-168.625634
Energy at 298.15K-168.629206
HF Energy-168.505122
Nuclear repulsion energy67.958239
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 B2PLYP/3-21G
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' 3196 3196 7.19      
2 A' 3081 3081 0.84      
3 A' 1545 1545 15.42      
4 A' 1415 1415 8.74      
5 A' 1253 1253 16.59      
6 A' 1117 1117 21.22      
7 A' 762 762 19.33      
8 A' 539 539 1.49      
9 A" 3165 3165 5.20      
10 A" 1545 1545 12.47      
11 A" 990 990 0.63      
12 A" 128 128 2.19      

Unscaled Zero Point Vibrational Energy (zpe) 9367.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9367.7 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 B2PLYP/3-21G
ABC
1.82809 0.36447 0.32238

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.994 -0.555 0.000
N2 0.000 0.614 0.000
O3 1.206 0.176 0.000
H4 -0.447 -1.497 0.000
H5 -1.619 -0.441 0.888
H6 -1.619 -0.441 -0.888

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.53412.31811.08921.09211.0921
N21.53411.28282.15722.12652.1265
O32.31811.28282.35153.02463.0246
H41.08922.15722.35151.81021.8102
H51.09212.12653.02461.81021.7769
H61.09212.12653.02461.81021.7769

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 110.435 N2 C1 H4 109.463
N2 C1 H5 106.936 N2 C1 H6 106.936
H4 C1 H5 112.174 H4 C1 H6 112.174
H5 C1 H6 108.892
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.459      
2 N 0.032      
3 O -0.248      
4 H 0.216      
5 H 0.230      
6 H 0.230      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.000 -1.365 0.000 2.422
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.142 0.396 0.000
y 0.396 -19.042 0.000
z 0.000 0.000 -16.513
Traceless
 xyz
x -0.365 0.396 0.000
y 0.396 -1.715 0.000
z 0.000 0.000 2.079
Polar
3z2-r24.159
x2-y20.900
xy0.396
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.910 0.205 0.000
y 0.205 2.350 0.000
z 0.000 0.000 2.076


<r2> (average value of r2) Å2
<r2> 43.120
(<r2>)1/2 6.567