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All results from a given calculation for CH3NO (nitrosomethane)

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 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.730133
Energy at 298.15K-32.733749
HF Energy-32.417524
Nuclear repulsion energy37.993923
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' 3163 3057 29.74      
2 A' 3031 2929 16.21      
3 A' 1496 1446 18.04      
4 A' 1436 1388 6.36      
5 A' 1317 1273 9.84      
6 A' 1141 1102 14.29      
7 A' 866 837 11.48      
8 A' 533 515 2.08      
9 A" 3159 3053 26.18      
10 A" 1490 1440 13.67      
11 A" 1009 975 3.18      
12 A" 136 131 2.13      

Unscaled Zero Point Vibrational Energy (zpe) 9388.4 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 9072.0 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
1.81264 0.35116 0.31202

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 -1.017 -0.539 0.000
N2 0.000 0.608 0.000
O3 1.239 0.164 0.000
H4 -0.511 -1.526 0.000
H5 -1.649 -0.406 0.902
H6 -1.649 -0.406 -0.902

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.53262.36261.10931.10901.1090
N21.53261.31592.19432.13552.1355
O32.36261.31592.43283.07823.0782
H41.10932.19432.43281.83311.8331
H51.10902.13553.07821.83311.8037
H61.10902.13553.07821.83311.8037

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 111.854 N2 C1 H4 111.308
N2 C1 H5 106.783 N2 C1 H6 106.783
H4 C1 H5 111.458 H4 C1 H6 111.458
H5 C1 H6 108.820
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability