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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCSD(T)/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(T)/cc-pVTZ
 hartrees
Energy at 0K-207.660786
Energy at 298.15K 
HF Energy-206.866683
Nuclear repulsion energy103.860638
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)/cc-pVTZ
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' 3148 3069        
2 A' 3050 2973        
3 A' 2337 2278        
4 A' 1513 1474        
5 A' 1474 1437        
6 A' 1453 1416        
7 A' 1159 1130        
8 A' 890 868        
9 A' 647 630        
10 A' 184 180        
11 A" 3121 3042        
12 A" 1519 1480        
13 A" 1134 1105        
14 A" 586 571        
15 A" 45 44        

Unscaled Zero Point Vibrational Energy (zpe) 11129.1 cm-1
Scaled (by 0.9748) Zero Point Vibrational Energy (zpe) 10848.6 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)/cc-pVTZ
ABC
2.40261 0.14696 0.14221

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.390 1.026 0.000
N2 0.000 0.616 0.000
C3 -0.577 -0.446 0.000
O4 -1.264 -1.402 0.000
H5 1.429 2.112 0.000
H6 1.903 0.657 0.889
H7 1.903 0.657 -0.889

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44902.45623.59681.08741.09061.0906
N21.44901.20842.38102.06952.10092.1009
C32.45621.20841.17743.25112.85592.8559
O43.59682.38101.17744.42783.88103.8810
H51.08742.06953.25114.42781.76981.7698
H61.09062.10092.85593.88101.76981.7776
H71.09062.10092.85593.88101.76981.7776

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 134.924 N2 C1 H5 108.514
N2 C1 H6 110.851 N2 C1 H7 110.851
N2 C3 O4 172.746 H5 C1 H6 108.700
H5 C1 H7 108.700 H6 C1 H7 109.168
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability