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All results from a given calculation for CH3NO (nitrosomethane)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-168.219010
Energy at 298.15K-168.222531
HF Energy-167.856435
Nuclear repulsion energy67.491936
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 QCISD/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' 3150 3027 7.98      
2 A' 3041 2923 2.08      
3 A' 1541 1481 11.06      
4 A' 1411 1356 6.61      
5 A' 1261 1211 16.44      
6 A' 1107 1064 18.60      
7 A' 739 710 16.02      
8 A' 530 510 1.14      
9 A" 3123 3001 8.18      
10 A" 1542 1482 9.42      
11 A" 989 951 1.25      
12 A" 110 106 1.51      

Unscaled Zero Point Vibrational Energy (zpe) 9271.9 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 8911.2 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 QCISD/3-21G*
ABC
1.80289 0.35848 0.31721

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.000 -0.570 0.000
N2 0.000 0.621 0.000
O3 1.211 0.188 0.000
H4 -0.438 -1.509 0.000
H5 -1.624 -0.462 0.896
H6 -1.624 -0.462 -0.896

Atom - Atom Distances (Å)
  C1 N2 O3 H4 H5 H6
C11.55512.33791.09451.09691.0969
N21.55511.28602.17422.14792.1479
O32.33791.28602.36653.04403.0440
H41.09452.17422.36651.81811.8181
H51.09692.14793.04401.81811.7911
H61.09692.14793.04401.81811.7911

picture of nitrosomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O3 110.393 N2 C1 H4 109.045
N2 C1 H5 106.907 N2 C1 H6 106.907
H4 C1 H5 112.123 H4 C1 H6 112.123
H5 C1 H6 109.465
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability