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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at QCISD(T)/Def2TZVPP
 hartrees
Energy at 0K-207.668778
Energy at 298.15K 
HF Energy-206.875240
Nuclear repulsion energy103.841573
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 QCISD(T)/Def2TZVPP
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' 3150 3150        
2 A' 3053 3053        
3 A' 2320 2320        
4 A' 1512 1512        
5 A' 1474 1474        
6 A' 1451 1451        
7 A' 1162 1162        
8 A' 888 888        
9 A' 645 645        
10 A' 180 180        
11 A" 3123 3123        
12 A" 1518 1518        
13 A" 1137 1137        
14 A" 587 587        
15 A" 52 52        

Unscaled Zero Point Vibrational Energy (zpe) 11125.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11125.5 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 QCISD(T)/Def2TZVPP
ABC
2.38194 0.14709 0.14226

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.393 1.020 0.000
N2 0.000 0.619 0.000
C3 -0.578 -0.443 0.000
O4 -1.267 -1.399 0.000
H5 1.439 2.106 0.000
H6 1.903 0.647 0.889
H7 1.903 0.647 -0.889

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44982.45513.59521.08731.09041.0904
N21.44981.20912.38222.07002.10042.1004
C32.45511.20911.17783.25132.85222.8522
O43.59522.38221.17784.42823.87583.8758
H51.08732.07003.25134.42821.77041.7704
H61.09042.10042.85223.87581.77041.7780
H71.09042.10042.85223.87581.77041.7780

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 134.646 N2 C1 H5 108.507
N2 C1 H6 110.761 N2 C1 H7 110.761
N2 C3 O4 172.817 H5 C1 H6 108.767
H5 C1 H7 108.767 H6 C1 H7 109.229
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability