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All results from a given calculation for CH3NO2 (Methane, nitro-)

using model chemistry: MP2/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 MP2/CEP-31G
 hartrees
Energy at 0K-48.492239
Energy at 298.15K 
HF Energy-48.042996
Nuclear repulsion energy66.638714
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 MP2/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' 3218 3109 19.32      
2 A' 3086 2982 13.61      
3 A' 1505 1454 14.50      
4 A' 1459 1410 0.24      
5 A' 1342 1296 20.48      
6 A' 1165 1126 0.01      
7 A' 872 842 1.46      
8 A' 609 589 31.75      
9 A' 541 522 1.14      
10 A" 3236 3127 5.10      
11 A" 1839 1777 9.48      
12 A" 1510 1459 15.71      
13 A" 1155 1116 0.85      
14 A" 452 437 0.47      
15 A" 27i 26i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10980.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 10610.6 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 MP2/CEP-31G
ABC
0.36209 0.32432 0.17706

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 -1.377 0.000
N2 -0.012 0.156 0.000
H3 1.059 -1.699 0.000
H4 -0.513 -1.706 0.918
H5 -0.513 -1.706 -0.918
O6 0.002 0.768 -1.162
O7 0.002 0.768 1.162

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.53361.10481.10291.10292.43962.4396
N21.53362.14272.13562.13561.31321.3132
H31.10482.14271.82081.82082.92462.9246
H41.10292.13561.82081.83593.27272.5385
H51.10292.13561.82081.83592.53853.2727
O62.43961.31322.92463.27272.53852.3240
O72.43961.31322.92462.53853.27272.3240

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 117.745 C1 N2 O7 117.745
N2 C1 H3 107.496 N2 C1 H4 107.060
N2 C1 H5 107.060 H3 C1 H4 111.124
H3 C1 H5 111.124 H4 C1 H5 112.668
O6 N2 O7 124.476
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability