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: B1B95/6-31G

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 B1B95/6-31G
 hartrees
Energy at 0K-244.824371
Energy at 298.15K 
HF Energy-244.824371
Nuclear repulsion energy123.470472
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 B1B95/6-31G
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' 3237 3087 1.11      
2 A' 3128 2983 0.03      
3 A' 1518 1448 19.52      
4 A' 1461 1394 0.24      
5 A' 1367 1304 91.62      
6 A' 1167 1113 1.67      
7 A' 917 875 7.16      
8 A' 661 631 23.87      
9 A' 604 576 4.33      
10 A" 3272 3120 0.00      
11 A" 1590 1516 140.00      
12 A" 1502 1432 87.02      
13 A" 1131 1079 13.45      
14 A" 476 454 0.42      
15 A" 45 42 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 11037.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 10526.6 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 B1B95/6-31G
ABC
0.39561 0.34966 0.19238

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 -1.324 0.000
N2 -0.012 0.163 0.000
H3 1.044 -1.642 0.000
H4 -0.498 -1.661 0.902
H5 -0.498 -1.661 -0.902
O6 0.002 0.736 -1.109
O7 0.002 0.736 1.109

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.48711.08921.08481.08482.33972.3397
N21.48712.09072.09212.09211.24871.2487
H31.08922.09071.78591.78592.82302.8230
H41.08482.09211.78591.80433.16882.4572
H51.08482.09211.78591.80432.45723.1688
O62.33971.24872.82303.16882.45722.2188
O72.33971.24872.82302.45723.16882.2188

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 117.304 C1 N2 O7 117.304
N2 C1 H3 107.482 N2 C1 H4 107.846
N2 C1 H5 107.846 H3 C1 H4 110.467
H3 C1 H5 110.467 H4 C1 H5 112.532
O6 N2 O7 125.361
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.282      
2 N 0.185      
3 H 0.232      
4 H 0.220      
5 H 0.220      
6 O -0.287      
7 O -0.287      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.067 -3.906 0.000 3.906
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.481 -0.139 0.000
y -0.139 -21.988 0.000
z 0.000 0.000 -26.922
Traceless
 xyz
x 2.974 -0.139 0.000
y -0.139 2.213 0.000
z 0.000 0.000 -5.187
Polar
3z2-r2-10.374
x2-y20.507
xy-0.139
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.242 -0.036 0.000
y -0.036 3.574 0.000
z 0.000 0.000 4.902


<r2> (average value of r2) Å2
<r2> 65.144
(<r2>)1/2 8.071