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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)=FULL/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)=FULL/Def2TZVPP
 hartrees
Energy at 0K-207.747311
Energy at 298.15K 
HF Energy-206.875871
Nuclear repulsion energy104.003300
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)=FULL/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' 3148 3148        
2 A' 3052 3052        
3 A' 2323 2323        
4 A' 1515 1515        
5 A' 1477 1477        
6 A' 1456 1456        
7 A' 1162 1162        
8 A' 887 887        
9 A' 644 644        
10 A' 179 179        
11 A" 3122 3122        
12 A" 1521 1521        
13 A" 1141 1141        
14 A" 594 594        
15 A" 55 55        

Unscaled Zero Point Vibrational Energy (zpe) 11137.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11137.4 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 QCISD(T)=FULL/Def2TZVPP
ABC
2.42985 0.14713 0.14244

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.384 1.032 0.000
N2 0.000 0.612 0.000
C3 -0.575 -0.448 0.000
O4 -1.258 -1.405 0.000
H5 1.417 2.117 0.000
H6 1.898 0.667 0.887
H7 1.898 0.667 -0.887

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44682.45593.59521.08521.08831.0883
N21.44681.20592.37762.06682.09582.0958
C32.45591.20591.17613.24742.85422.8542
O43.59522.37761.17614.42283.87843.8784
H51.08522.06683.24744.42281.76691.7669
H61.08832.09582.85423.87841.76691.7743
H71.08832.09582.85423.87841.76691.7743

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 135.381 N2 C1 H5 108.581
N2 C1 H6 110.731 N2 C1 H7 110.731
N2 C3 O4 173.005 H5 C1 H6 108.769
H5 C1 H7 108.769 H6 C1 H7 109.211
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability