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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD=FULL/TZVP

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=FULL/TZVP
 hartrees
Energy at 0K-207.587187
Energy at 298.15K 
HF Energy-206.859950
Nuclear repulsion energy104.248864
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=FULL/TZVP
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' 3181 3014 15.30      
2 A' 3078 2917 44.60      
3 A' 2391 2265 1213.76      
4 A' 1542 1461 0.20      
5 A' 1512 1433 14.04      
6 A' 1498 1420 42.66      
7 A' 1187 1125 25.39      
8 A' 901 854 33.49      
9 A' 664 629 35.03      
10 A' 167 158 21.25      
11 A" 3150 2984 21.88      
12 A" 1530 1450 5.62      
13 A" 1160 1099 1.07      
14 A" 618 586 31.09      
15 A" 61 58 2.38      

Unscaled Zero Point Vibrational Energy (zpe) 11319.6 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 10725.3 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=FULL/TZVP
ABC
2.51855 0.14697 0.14261

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.369 1.058 0.000
N2 0.000 0.596 0.000
C3 -0.574 -0.455 0.000
O4 -1.240 -1.418 0.000
H5 1.368 2.145 0.000
H6 1.894 0.707 0.888
H7 1.894 0.707 -0.888

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44462.46273.59731.08651.09011.0901
N21.44461.19792.36582.06642.09492.0949
C32.46271.19791.17123.24532.86922.8692
O43.59732.36581.17124.41603.89003.8900
H51.08652.06643.24534.41601.76971.7697
H61.09012.09492.86923.89001.76971.7767
H71.09012.09492.86923.89001.76971.7767

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.294 N2 C1 H5 108.633
N2 C1 H6 110.707 N2 C1 H7 110.707
N2 C3 O4 173.969 H5 C1 H6 108.793
H5 C1 H7 108.793 H6 C1 H7 109.161
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability