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: TPSSh/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 TPSSh/6-31G
 hartrees
Energy at 0K-244.930058
Energy at 298.15K 
HF Energy-244.930058
Nuclear repulsion energy122.127238
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 TPSSh/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' 3209 3088 2.45      
2 A' 3103 2985 0.47      
3 A' 1524 1466 16.59      
4 A' 1454 1399 0.44      
5 A' 1298 1249 84.86      
6 A' 1155 1111 0.56      
7 A' 871 838 7.18      
8 A' 630 606 19.53      
9 A' 579 557 3.69      
10 A" 3242 3119 0.55      
11 A" 1541 1482 16.31      
12 A" 1477 1421 170.47      
13 A" 1117 1075 17.37      
14 A" 458 440 0.36      
15 A" 41 39 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 10849.4 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 10438.2 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 TPSSh/6-31G
ABC
0.38619 0.34234 0.18799

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 -1.341 0.000
N2 -0.012 0.164 0.000
H3 1.047 -1.653 0.000
H4 -0.500 -1.674 0.905
H5 -0.500 -1.674 -0.905
O6 0.002 0.743 -1.124
O7 0.002 0.743 1.124

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.50511.09121.08691.08692.36792.3679
N21.50512.10372.10582.10581.26421.2642
H31.09122.10371.79251.79252.84612.8461
H41.08692.10581.79251.81013.19512.4781
H51.08692.10581.79251.81012.47813.1951
O62.36791.26422.84613.19512.47812.2473
O72.36791.26422.84612.47813.19512.2473

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 117.262 C1 N2 O7 117.262
N2 C1 H3 107.169 N2 C1 H4 107.570
N2 C1 H5 107.570 H3 C1 H4 110.762
H3 C1 H5 110.762 H4 C1 H5 112.745
O6 N2 O7 125.444
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.270      
2 N 0.184      
3 H 0.225      
4 H 0.213      
5 H 0.213      
6 O -0.282      
7 O -0.282      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.064 -3.822 0.000 3.823
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.274 -0.032 0.000
y -0.032 3.729 0.000
z 0.000 0.000 4.969


<r2> (average value of r2) Å2
<r2> 66.235
(<r2>)1/2 8.138