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/TZVP

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/TZVP
 hartrees
Energy at 0K-244.478404
Energy at 298.15K 
HF Energy-243.748084
Nuclear repulsion energy125.725672
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/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3242 3032 1.91      
2 A' 3143 2939 1.36      
3 A' 1518 1419 35.25      
4 A' 1506 1409 45.63      
5 A' 1469 1374 4.81      
6 A' 1178 1102 0.28      
7 A' 988 924 7.50      
8 A' 698 653 27.63      
9 A' 622 581 5.78      
10 A" 3271 3059 0.28      
11 A" 1764 1650 411.47      
12 A" 1508 1410 30.14      
13 A" 1158 1083 18.20      
14 A" 500 468 1.03      
15 A" 27 25 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 11295.8 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 10563.9 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/TZVP
ABC
0.41823 0.35419 0.19900

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.319 0.000
N2 -0.012 0.172 0.000
H3 1.044 -1.624 0.000
H4 -0.495 -1.655 0.902
H5 -0.495 -1.655 -0.902
O6 0.001 0.728 -1.077
O7 0.001 0.728 1.077

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.49061.08661.08311.08312.31202.3120
N21.49062.08352.09402.09401.21151.2115
H31.08662.08351.78421.78422.78842.7884
H41.08312.09401.78421.80403.13672.4402
H51.08312.09401.78421.80402.44023.1367
O62.31201.21152.78843.13672.44022.1530
O72.31201.21152.78842.44023.13672.1530

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 117.291 C1 N2 O7 117.291
N2 C1 H3 106.844 N2 C1 H4 107.852
N2 C1 H5 107.852 H3 C1 H4 110.634
H3 C1 H5 110.634 H4 C1 H5 112.767
O6 N2 O7 125.384
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability