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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-207.431603
Energy at 298.15K 
HF Energy-206.805090
Nuclear repulsion energy103.504282
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/cc-pVDZ
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' 3174 3007 16.89      
2 A' 3067 2905 47.92      
3 A' 2360 2236 1014.18      
4 A' 1512 1432 3.46      
5 A' 1482 1404 8.83      
6 A' 1464 1387 52.05      
7 A' 1159 1098 22.95      
8 A' 920 871 29.95      
9 A' 663 628 28.07      
10 A' 182 172 18.26      
11 A" 3145 2980 23.74      
12 A" 1509 1430 4.69      
13 A" 1130 1071 0.34      
14 A" 596 565 23.95      
15 A" 45 42 1.72      

Unscaled Zero Point Vibrational Energy (zpe) 11204.4 cm-1
Scaled (by 0.9473) Zero Point Vibrational Energy (zpe) 10613.9 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/cc-pVDZ
ABC
2.22209 0.14782 0.14241

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.414 0.977 0.000
N2 0.000 0.639 0.000
C3 -0.591 -0.426 0.000
O4 -1.286 -1.377 0.000
H5 1.513 2.073 0.000
H6 1.919 0.580 0.899
H7 1.919 0.580 -0.899

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45382.44673.58191.10091.10431.1043
N21.45381.21792.39142.08412.11962.1196
C32.44671.21791.17813.26622.84932.8493
O43.58192.39141.17814.44233.86133.8613
H51.10092.08413.26624.44231.78911.7891
H61.10432.11962.84933.86131.78911.7979
H71.10432.11962.84933.86131.78911.7979

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 132.439 N2 C1 H5 108.544
N2 C1 H6 111.172 N2 C1 H7 111.172
N2 C3 O4 172.863 H5 C1 H6 108.447
H5 C1 H7 108.447 H6 C1 H7 108.980
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability