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All results from a given calculation for CH3NCO (methylisocyante)

using model chemistry: CCD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Cs 1A'
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-207.420586
Energy at 298.15K 
HF Energy-206.798478
Nuclear repulsion energy103.659497
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 CCD/6-31+G**
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' 3232 3045 13.29      
2 A' 3122 2942 48.09      
3 A' 2390 2252 1301.20      
4 A' 1555 1466 1.79      
5 A' 1523 1436 13.55      
6 A' 1508 1421 39.63      
7 A' 1188 1119 29.17      
8 A' 904 852 32.95      
9 A' 637 600 35.80      
10 A' 162 153 22.76      
11 A" 3204 3019 19.31      
12 A" 1555 1465 5.29      
13 A" 1159 1092 0.99      
14 A" 587 553 30.77      
15 A" 60 56 2.84      

Unscaled Zero Point Vibrational Energy (zpe) 11393.5 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 10736.1 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 CCD/6-31+G**
ABC
2.58432 0.14461 0.14058

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.359 1.092 0.000
N2 0.000 0.594 0.000
C3 -0.562 -0.473 0.000
O4 -1.236 -1.445 0.000
H5 1.326 2.178 0.000
H6 1.890 0.755 0.889
H7 1.890 0.755 -0.889

Atom - Atom Distances (Å)
  C1 N2 C3 O4 H5 H6 H7
C11.44742.47823.62871.08611.08941.0894
N21.44741.20602.38362.06562.09522.0952
C32.47821.20601.18203.25462.88342.8834
O43.62872.38361.18204.43653.92433.9243
H51.08612.06563.25464.43651.77041.7704
H61.08942.09522.88343.92431.77041.7780
H71.08942.09522.88343.92431.77041.7780

picture of methylisocyante state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 137.939 N2 C1 H5 108.395
N2 C1 H6 110.573 N2 C1 H7 110.573
N2 C3 O4 173.071 H5 C1 H6 108.936
H5 C1 H7 108.936 H6 C1 H7 109.386
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability