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: CISD/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 CISD/daug-cc-pVTZ
 hartrees
Energy at 0K-207.534917
Energy at 298.15K 
HF Energy-206.873146
Nuclear repulsion energy104.958139
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/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CISD/daug-cc-pVTZ
ABC
2.67622 0.14780 0.14382

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.340 1.089 0.000
N2 0.000 0.576 0.000
C3 -0.564 -0.469 0.000
O4 -1.213 -1.431 0.000
H5 1.300 2.168 0.000
H6 1.874 0.762 0.882
H7 1.874 0.762 -0.882

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.43532.46063.58801.07911.08201.0820
N21.43531.18722.34532.05492.07992.0799
C32.46061.18721.16093.22862.87022.8702
O43.58802.34531.16094.38933.88843.8884
H51.07912.05493.22864.38931.75661.7566
H61.08202.07992.87023.88841.75661.7642
H71.08202.07992.87023.88841.75661.7642

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 139.329 N2 C1 H5 108.793
N2 C1 H6 110.645 N2 C1 H7 110.645
N2 C3 O4 174.377 H5 C1 H6 108.746
H5 C1 H7 108.746 H6 C1 H7 109.219
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability