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: B3LYP/CEP-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 B3LYP/CEP-31G*
 hartrees
Energy at 0K-49.215926
Energy at 298.15K 
HF Energy-49.215926
Nuclear repulsion energy69.048393
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 B3LYP/CEP-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' 3186 3077 10.66      
2 A' 3091 2985 3.26      
3 A' 1473 1422 11.15      
4 A' 1424 1375 51.46      
5 A' 1399 1351 38.53      
6 A' 1126 1087 2.00      
7 A' 904 873 8.24      
8 A' 638 616 23.27      
9 A' 584 564 4.84      
10 A" 3214 3104 4.22      
11 A" 1643 1587 292.10      
12 A" 1460 1410 36.23      
13 A" 1104 1066 9.20      
14 A" 461 445 0.69      
15 A" 26i 26i 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 10840.8 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 10469.0 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 B3LYP/CEP-31G*
ABC
0.39623 0.34227 0.19041

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.342 0.000
N2 -0.011 0.172 0.000
H3 1.058 -1.647 0.000
H4 -0.500 -1.683 0.915
H5 -0.500 -1.683 -0.915
O6 0.001 0.741 -1.107
O7 0.001 0.741 1.107

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.51391.10071.09731.09732.35872.3587
N21.51392.11022.12532.12531.24491.2449
H31.10072.11021.80711.80712.83682.8368
H41.09732.12531.80711.83023.19612.4824
H51.09732.12531.80711.83022.48243.1961
O62.35871.24492.83683.19612.48242.2146
O72.35871.24492.83682.48243.19612.2146

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 117.183 C1 N2 O7 117.183
N2 C1 H3 106.554 N2 C1 H4 107.900
N2 C1 H5 107.900 H3 C1 H4 110.595
H3 C1 H5 110.595 H4 C1 H5 113.012
O6 N2 O7 125.610
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.567      
2 N 0.176      
3 H 0.220      
4 H 0.231      
5 H 0.231      
6 O -0.146      
7 O -0.146      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.024 -3.792 0.000 3.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.305 -0.078 0.000
y -0.078 -21.740 0.000
z 0.000 0.000 -26.213
Traceless
 xyz
x 2.672 -0.078 0.000
y -0.078 2.019 0.000
z 0.000 0.000 -4.691
Polar
3z2-r2-9.383
x2-y20.435
xy-0.078
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.484 -0.068 0.000
y -0.068 3.970 0.000
z 0.000 0.000 5.118


<r2> (average value of r2) Å2
<r2> 54.741
(<r2>)1/2 7.399