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 CH3NCO (methylisocyante)

using model chemistry: CCSD/daug-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 CCSD/daug-cc-pVTZ
 hartrees
Energy at 0K-207.640496
Energy at 298.15K 
HF Energy-206.871440
Nuclear repulsion energy104.212106
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 CCSD/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/daug-cc-pVTZ
ABC
2.50126 0.14705 0.14263

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.373 1.051 0.000
N2 0.000 0.600 0.000
C3 -0.573 -0.455 0.000
O4 -1.246 -1.413 0.000
H5 1.381 2.138 0.000
H6 1.894 0.697 0.888
H7 1.894 0.697 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44532.46063.59631.08651.08941.0894
N21.44531.20002.36762.06712.09472.0947
C32.46061.20001.17143.24642.86412.8641
O43.59632.36761.17144.41733.88653.8865
H51.08652.06713.24644.41731.76901.7690
H61.08942.09472.86413.88651.76901.7767
H71.08942.09472.86413.88651.76901.7767

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.724 N2 C1 H5 108.635
N2 C1 H6 110.676 N2 C1 H7 110.676
N2 C3 O4 173.448 H5 C1 H6 108.774
H5 C1 H7 108.774 H6 C1 H7 109.257
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability