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 CH3NO2 (Methane, nitro-)

using model chemistry: B2PLYP=FULLultrafine/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS Os out of place 1A'
Energy calculated at B2PLYP=FULLultrafine/3-21G*
 hartrees
Energy at 0K-243.336486
Energy at 298.15K 
HF Energy-243.156653
Nuclear repulsion energy120.244690
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=FULLultrafine/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' 3219 3219 2.02      
2 A' 3126 3126 0.78      
3 A' 1560 1560 13.71      
4 A' 1444 1444 1.95      
5 A' 1184 1184 48.86      
6 A' 1145 1145 2.31      
7 A' 806 806 1.47      
8 A' 590 590 23.35      
9 A' 520 520 3.39      
10 A" 3252 3252 0.24      
11 A" 1561 1561 5.69      
12 A" 1382 1382 53.02      
13 A" 1092 1092 8.85      
14 A" 422 422 0.24      
15 A" 16 16 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 10659.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10659.0 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=FULLultrafine/3-21G*
ABC
0.36508 0.34034 0.18230

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 -1.347 0.000
N2 -0.015 0.166 0.000
H3 1.047 -1.659 0.000
H4 -0.502 -1.669 0.905
H5 -0.502 -1.669 -0.905
O6 0.003 0.745 -1.158
O7 0.003 0.745 1.158

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.51361.08941.08531.08532.39152.3915
N21.51362.11162.10362.10361.29491.2949
H31.08942.11161.79401.79402.86532.8653
H41.08532.10361.79401.81013.21572.4795
H51.08532.10361.79401.81012.47953.2157
O62.39151.29492.86533.21572.47952.3163
O72.39151.29492.86532.47953.21572.3163

picture of Methane, nitro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O6 116.542 C1 N2 O7 116.542
N2 C1 H3 107.302 N2 C1 H4 106.918
N2 C1 H5 106.918 H3 C1 H4 111.170
H3 C1 H5 111.170 H4 C1 H5 113.011
O6 N2 O7 126.863
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.382      
2 N 0.208      
3 H 0.253      
4 H 0.244      
5 H 0.244      
6 O -0.283      
7 O -0.283      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.058 -3.445 0.000 3.446
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.444 -0.149 0.000
y -0.149 -21.768 0.000
z 0.000 0.000 -26.106
Traceless
 xyz
x 2.493 -0.149 0.000
y -0.149 2.007 0.000
z 0.000 0.000 -4.500
Polar
3z2-r2-8.999
x2-y20.324
xy-0.149
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.033 -0.011 0.000
y -0.011 3.361 0.000
z 0.000 0.000 4.598


<r2> (average value of r2) Å2
<r2> 67.424
(<r2>)1/2 8.211