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All results from a given calculation for CH3NC (methyl isocyanide)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-131.451734
Energy at 298.15K-131.454172
HF Energy-131.156957
Nuclear repulsion energy59.147799
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/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3059 2926 12.89      
2 A1 2196 2100 82.27      
3 A1 1505 1440 3.32      
4 A1 909 870 28.08      
5 E 3130 2993 9.00      
5 E 3130 2993 9.00      
6 E 1573 1505 10.12      
6 E 1573 1505 10.12      
7 E 1185 1134 0.32      
7 E 1185 1134 0.32      
8 E 297 284 2.18      
8 E 297 284 2.18      

Unscaled Zero Point Vibrational Energy (zpe) 10020.0 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 9584.2 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/3-21G*
ABC
5.21453 0.32438 0.32438

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.133
N2 0.000 0.000 0.321
C3 0.000 0.000 1.506
H4 0.000 1.034 -1.496
H5 0.896 -0.517 -1.496
H6 -0.896 -0.517 -1.496

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.45352.63901.09611.09611.0961
N21.45351.18552.09082.09082.0908
C32.63901.18553.17583.17583.1758
H41.09612.09083.17581.79101.7910
H51.09612.09083.17581.79101.7910
H61.09612.09083.17581.79101.7910

picture of methyl isocyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 180.000 N2 C1 H4 109.378
N2 C1 H5 109.378 N2 C1 H6 109.378
H4 C1 H5 109.564 H4 C1 H6 109.564
H5 C1 H6 109.564
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability