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All results from a given calculation for CH3NO (nitrosomethane)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-168.180635
Energy at 298.15K-168.184256
HF Energy-167.861033
Nuclear repulsion energy68.464164
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 CISD/3-21G*
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' 3218 3007 7.49      
2 A' 3113 2909 1.43      
3 A' 1576 1473 12.33      
4 A' 1466 1370 3.21      
5 A' 1394 1302 27.20      
6 A' 1164 1087 14.70      
7 A' 808 755 9.99      
8 A' 559 522 2.61      
9 A" 3193 2983 6.99      
10 A" 1574 1470 11.12      
11 A" 1028 960 1.36      
12 A" 128 120 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 9609.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 8979.4 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 CISD/3-21G*
ABC
1.87743 0.36709 0.32598

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.984 -0.567 0.000
N2 0.000 0.606 0.000
O3 1.193 0.199 0.000
H4 -0.431 -1.506 0.000
H5 -1.607 -0.463 0.889
H6 -1.607 -0.463 -0.889

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.53082.30801.08921.09141.0914
N21.53081.26052.15492.12502.1250
O32.30801.26052.35483.01223.0122
H41.08922.15492.35481.80671.8067
H51.09142.12503.01221.80671.7787
H61.09142.12503.01221.80671.7787

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 111.184 N2 C1 H4 109.512
N2 C1 H5 107.081 N2 C1 H6 107.081
H4 C1 H5 111.893 H4 C1 H6 111.893
H5 C1 H6 109.153
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability