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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD(T)=FULL/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 CCSD(T)=FULL/6-31G*
 hartrees
Energy at 0K-207.432817
Energy at 298.15K 
HF Energy-206.786725
Nuclear repulsion energy103.262627
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(T)=FULL/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' 3167 3074        
2 A' 3065 2975        
3 A' 2367 2298        
4 A' 1541 1496        
5 A' 1501 1457        
6 A' 1480 1436        
7 A' 1175 1141        
8 A' 895 869        
9 A' 626 608        
10 A' 179 174        
11 A" 3139 3047        
12 A" 1548 1503        
13 A" 1150 1117        
14 A" 570 553        
15 A" 73 71        

Unscaled Zero Point Vibrational Energy (zpe) 11237.6 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 10908.4 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 CCSD(T)=FULL/6-31G*
ABC
2.47737 0.14444 0.14014

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.375 1.068 0.000
N2 0.000 0.609 0.000
C3 -0.566 -0.465 0.000
O4 -1.254 -1.433 0.000
H5 1.372 2.161 0.000
H6 1.903 0.715 0.894
H7 1.903 0.715 -0.894

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44972.47333.62911.09341.09661.0966
N21.44971.21402.39672.07152.10572.1057
C32.47331.21401.18813.26372.87942.8794
O43.62912.39671.18814.45173.92293.9229
H51.09342.07153.26374.45171.78101.7810
H61.09662.10572.87943.92291.78101.7882
H71.09662.10572.87943.92291.78101.7882

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 136.232 N2 C1 H5 108.278
N2 C1 H6 110.812 N2 C1 H7 110.812
N2 C3 O4 172.361 H5 C1 H6 108.825
H5 C1 H7 108.825 H6 C1 H7 109.238
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability