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=FULL/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=FULL/cc-pVTZ
 hartrees
Energy at 0K-169.542155
Energy at 298.15K-169.545873
HF Energy-168.891872
Nuclear repulsion energy70.573669
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=FULL/cc-pVTZ
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' 3199 3037 7.03      
2 A' 3091 2934 2.17      
3 A' 1565 1486 17.51      
4 A' 1481 1406 23.26      
5 A' 1392 1321 23.03      
6 A' 1169 1110 13.92      
7 A' 906 860 14.30      
8 A' 584 554 2.11      
9 A" 3180 3019 1.95      
10 A" 1489 1413 11.09      
11 A" 989 939 2.81      
12 A" 159 151 1.23      

Unscaled Zero Point Vibrational Energy (zpe) 9600.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 9114.5 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=FULL/cc-pVTZ
ABC
2.03897 0.38802 0.34673

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.949 -0.549 0.000
N2 0.000 0.571 0.000
O3 1.160 0.208 0.000
H4 -0.430 -1.501 0.000
H5 -1.578 -0.431 0.876
H6 -1.578 -0.431 -0.876

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.46732.23971.08411.08531.0853
N21.46731.21522.11592.06412.0641
O32.23971.21522.33392.94452.9445
H41.08412.11592.33391.79751.7975
H51.08532.06412.94451.79751.7524
H61.08532.06412.94451.79751.7524

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 112.885 N2 C1 H4 111.168
N2 C1 H5 106.968 N2 C1 H6 106.968
H4 C1 H5 111.898 H4 C1 H6 111.898
H5 C1 H6 107.665
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability