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: MP3/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-244.620229
Energy at 298.15K 
HF Energy-243.771009
Nuclear repulsion energy126.241676
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/Def2TZVPP
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' 3230 3230 1.25      
2 A' 3134 3134 0.84      
3 A' 1533 1533 68.94      
4 A' 1503 1503 18.47      
5 A' 1449 1449 2.79      
6 A' 1171 1171 0.84      
7 A' 992 992 7.11      
8 A' 702 702 28.77      
9 A' 638 638 5.46      
10 A" 3260 3260 0.08      
11 A" 1777 1777 408.97      
12 A" 1494 1494 31.07      
13 A" 1140 1140 14.12      
14 A" 495 495 1.18      
15 A" 34 34 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 11275.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11275.8 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/Def2TZVPP
ABC
0.42046 0.35829 0.20074

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.311 0.000
N2 -0.010 0.173 0.000
H3 1.042 -1.616 0.000
H4 -0.492 -1.648 0.901
H5 -0.492 -1.648 -0.901
O6 0.001 0.723 -1.074
O7 0.001 0.723 1.074

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.48341.08501.08141.08142.29952.2995
N21.48342.07472.08842.08841.20641.2064
H31.08502.07471.77961.77962.77592.7759
H41.08142.08841.77961.80283.12512.4280
H51.08142.08841.77961.80282.42803.1251
O62.29951.20642.77593.12512.42802.1472
O72.29951.20642.77592.42803.12512.1472

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 117.126 C1 N2 O7 117.126
N2 C1 H3 106.727 N2 C1 H4 108.002
N2 C1 H5 108.002 H3 C1 H4 110.461
H3 C1 H5 110.461 H4 C1 H5 112.931
O6 N2 O7 125.729
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability