return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH3NO2 (Methane, nitro-)

using model chemistry: MP3=FULL/6-31+G**

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 MP3=FULL/6-31+G**
 hartrees
Energy at 0K-244.379900
Energy at 298.15K 
HF Energy-243.672910
Nuclear repulsion energy125.200291
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 MP3=FULL/6-31+G**
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' 3288 3063 1.40      
2 A' 3182 2964 1.68      
3 A' 1539 1434 21.71      
4 A' 1526 1421 50.52      
5 A' 1478 1377 3.78      
6 A' 1181 1100 0.43      
7 A' 982 915 3.92      
8 A' 691 643 29.29      
9 A' 622 579 5.33      
10 A" 3318 3091 0.07      
11 A" 1782 1660 412.40      
12 A" 1527 1423 31.58      
13 A" 1162 1082 17.17      
14 A" 497 463 1.17      
15 A" 43 40 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 11408.7 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 10628.3 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 MP3=FULL/6-31+G**
ABC
0.41152 0.35457 0.19756

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.318 0.000
N2 -0.012 0.168 0.000
H3 1.043 -1.622 0.000
H4 -0.494 -1.651 0.901
H5 -0.494 -1.651 -0.901
O6 0.001 0.728 -1.086
O7 0.001 0.728 1.086

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.48571.08471.08131.08132.31632.3163
N21.48572.07762.08682.08681.22221.2222
H31.08472.07761.78171.78172.79062.7906
H41.08132.08681.78171.80263.13972.4377
H51.08132.08681.78171.80262.43773.1397
O62.31631.22222.79063.13972.43772.1722
O72.31631.22222.79062.43773.13972.1722

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 117.277 C1 N2 O7 117.277
N2 C1 H3 106.820 N2 C1 H4 107.724
N2 C1 H5 107.724 H3 C1 H4 110.687
H3 C1 H5 110.687 H4 C1 H5 112.921
O6 N2 O7 125.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability