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 CH3NO (nitrosomethane)

using model chemistry: MP2/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-169.514386
Energy at 298.15K-169.518097
HF Energy-168.893841
Nuclear repulsion energy70.286082
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/aug-cc-pVTZ
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' 3188 3038 6.66      
2 A' 3065 2920 2.05      
3 A' 1538 1466 15.86      
4 A' 1473 1404 26.08      
5 A' 1389 1324 24.04      
6 A' 1165 1110 14.10      
7 A' 897 855 15.18      
8 A' 581 554 1.82      
9 A" 3169 3020 1.51      
10 A" 1480 1411 11.67      
11 A" 988 942 3.08      
12 A" 157 150 1.09      

Unscaled Zero Point Vibrational Energy (zpe) 9545.6 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 9096.0 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/aug-cc-pVTZ
ABC
2.02423 0.38465 0.34383

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.953 -0.552 0.000
N2 0.000 0.572 0.000
O3 1.165 0.209 0.000
H4 -0.434 -1.508 0.000
H5 -1.583 -0.430 0.880
H6 -1.583 -0.430 -0.880

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.47352.24991.08841.08961.0896
N21.47351.22002.12542.07052.0705
O32.24991.22002.34612.95542.9554
H41.08842.12542.34611.80511.8051
H51.08962.07052.95541.80511.7607
H61.08962.07052.95541.80511.7607

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 112.963 N2 C1 H4 111.229
N2 C1 H5 106.813 N2 C1 H6 106.813
H4 C1 H5 111.949 H4 C1 H6 111.949
H5 C1 H6 107.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability