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/6-31G**

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/6-31G**
 hartrees
Energy at 0K-244.795091
Energy at 298.15K 
HF Energy-244.556895
Nuclear repulsion energy124.285713
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/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' 3234 3234 1.89      
2 A' 3130 3130 1.32      
3 A' 1514 1514 10.07      
4 A' 1441 1441 2.58      
5 A' 1416 1416 79.08      
6 A' 1154 1154 0.78      
7 A' 929 929 7.92      
8 A' 664 664 24.68      
9 A' 602 602 5.28      
10 A" 3263 3263 0.53      
11 A" 1667 1667 181.97      
12 A" 1502 1502 33.39      
13 A" 1127 1127 7.89      
14 A" 479 479 0.52      
15 A" 32 32 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 11075.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11075.6 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/6-31G**
ABC
0.40280 0.35180 0.19471

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.322 0.000
N2 -0.012 0.170 0.000
H3 1.045 -1.630 0.000
H4 -0.495 -1.661 0.903
H5 -0.495 -1.661 -0.903
O6 0.001 0.731 -1.099
O7 0.001 0.731 1.099

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.49271.08811.08471.08472.32872.3287
N21.49272.08802.09782.09781.23351.2335
H31.08812.08801.78541.78542.80542.8054
H41.08472.09781.78541.80653.15812.4503
H51.08472.09781.78541.80652.45033.1581
O62.32871.23352.80543.15812.45032.1972
O72.32871.23352.80542.45033.15812.1972

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 117.026 C1 N2 O7 117.026
N2 C1 H3 106.964 N2 C1 H4 107.920
N2 C1 H5 107.920 H3 C1 H4 110.515
H3 C1 H5 110.515 H4 C1 H5 112.768
O6 N2 O7 125.915
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.198      
2 N 0.411      
3 H 0.173      
4 H 0.164      
5 H 0.164      
6 O -0.357      
7 O -0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.043 -3.458 0.000 3.458
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.392 -0.109 0.000
y -0.109 -21.886 0.000
z 0.000 0.000 -26.045
Traceless
 xyz
x 2.573 -0.109 0.000
y -0.109 1.832 0.000
z 0.000 0.000 -4.406
Polar
3z2-r2-8.812
x2-y20.494
xy-0.109
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.522 -0.023 0.000
y -0.023 3.818 0.000
z 0.000 0.000 4.809


<r2> (average value of r2) Å2
<r2> 64.374
(<r2>)1/2 8.023