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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: QCISD(T)/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 QCISD(T)/TZVP
 hartrees
Energy at 0K-207.546750
Energy at 298.15K 
HF Energy-206.857621
Nuclear repulsion energy103.733621
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)/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' 3163 3046        
2 A' 3057 2945        
3 A' 2331 2245        
4 A' 1519 1463        
5 A' 1489 1434        
6 A' 1456 1403        
7 A' 1173 1129        
8 A' 886 853        
9 A' 638 614        
10 A' 178 172        
11 A" 3130 3014        
12 A" 1514 1459        
13 A" 1145 1103        
14 A" 583 562        
15 A" 66 63        

Unscaled Zero Point Vibrational Energy (zpe) 11163.4 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 10752.6 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 QCISD(T)/TZVP
ABC
2.36332 0.14691 0.14204

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.397 1.017 0.000
N2 0.000 0.620 0.000
C3 -0.581 -0.440 0.000
O4 -1.269 -1.399 0.000
H5 1.445 2.105 0.000
H6 1.906 0.641 0.891
H7 1.906 0.641 -0.891

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.45232.45713.59761.08871.09251.0925
N21.45231.20912.38422.07212.10392.1039
C32.45711.20911.17953.25342.85472.8547
O43.59762.38421.17954.43183.87753.8775
H51.08872.07213.25344.43181.77411.7741
H61.09252.10392.85473.87751.77411.7812
H71.09252.10392.85473.87751.77411.7812

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 134.609 N2 C1 H5 108.418
N2 C1 H6 110.734 N2 C1 H7 110.734
N2 C3 O4 173.057 H5 C1 H6 108.850
H5 C1 H7 108.850 H6 C1 H7 109.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability