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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-169.297691
Energy at 298.15K-169.301374
HF Energy-168.822909
Nuclear repulsion energy69.771701
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' 3227 3043 7.57      
2 A' 3103 2926 1.66      
3 A' 1551 1462 8.30      
4 A' 1510 1424 18.34      
5 A' 1429 1348 25.16      
6 A' 1184 1117 11.51      
7 A' 908 857 13.08      
8 A' 584 551 2.03      
9 A" 3207 3024 3.72      
10 A" 1519 1432 10.15      
11 A" 1008 951 1.97      
12 A" 142 134 1.88      

Unscaled Zero Point Vibrational Energy (zpe) 9685.9 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 9133.8 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
1.97014 0.38153 0.33999

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 -0.961 -0.545 0.000
N2 0.000 0.582 0.000
O3 1.174 0.194 0.000
H4 -0.440 -1.505 0.000
H5 -1.592 -0.426 0.885
H6 -1.592 -0.426 -0.885

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.48102.25951.09231.09361.0936
N21.48101.23612.13252.08202.0820
O32.25951.23612.34362.97002.9700
H41.09232.13252.34361.80991.8099
H51.09362.08202.97001.80991.7702
H61.09362.08202.97001.80991.7702

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 112.214 N2 C1 H4 111.028
N2 C1 H5 106.970 N2 C1 H6 106.970
H4 C1 H5 111.778 H4 C1 H6 111.778
H5 C1 H6 108.062
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability