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: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-169.078742
Energy at 298.15K-169.082381
HF Energy-168.728394
Nuclear repulsion energy68.008270
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 MP2/6-31G
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' 3182 3044 10.49      
2 A' 3066 2934 3.21      
3 A' 1535 1469 16.91      
4 A' 1461 1398 8.76      
5 A' 1298 1242 9.58      
6 A' 1152 1102 14.63      
7 A' 850 814 13.21      
8 A' 553 529 1.83      
9 A" 3175 3038 6.37      
10 A" 1533 1467 11.89      
11 A" 1028 984 2.52      
12 A" 138 132 2.43      

Unscaled Zero Point Vibrational Energy (zpe) 9485.1 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 9075.4 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 MP2/6-31G
ABC
1.89275 0.36126 0.32191

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.998 -0.540 0.000
N2 0.000 0.594 0.000
O3 1.216 0.178 0.000
H4 -0.491 -1.513 0.000
H5 -1.625 -0.415 0.891
H6 -1.625 -0.415 -0.891

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.51112.32811.09691.09671.0967
N21.51111.28562.16352.11032.1103
O32.32811.28562.40293.03613.0361
H41.09692.16352.40291.81241.8124
H51.09672.11033.03611.81241.7828
H61.09672.11033.03611.81241.7828

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 112.452 N2 C1 H4 111.115
N2 C1 H5 106.964 N2 C1 H6 106.964
H4 C1 H5 111.424 H4 C1 H6 111.424
H5 C1 H6 108.740
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability