return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CID/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CID/6-31G
 hartrees
Energy at 0K-132.099782
Energy at 298.15K-132.102209
Nuclear repulsion energy59.441322
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 CID/6-31G
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 3108 2907 20.31      
2 A1 2252 2106 128.23      
3 A1 1540 1440 2.03      
4 A1 967 905 24.86      
5 E 3190 2983 11.82      
5 E 3190 2983 11.82      
6 E 1572 1470 11.12      
6 E 1572 1470 11.12      
7 E 1207 1129 1.17      
7 E 1207 1129 1.17      
8 E 286 267 4.60      
8 E 286 267 4.60      

Unscaled Zero Point Vibrational Energy (zpe) 10188.5 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 9528.3 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 CID/6-31G
ABC
5.25889 0.32823 0.32823

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.123
N2 0.000 0.000 0.316
C3 0.000 0.000 1.500
H4 0.000 1.030 -1.491
H5 0.892 -0.515 -1.491
H6 -0.892 -0.515 -1.491

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43862.62251.09361.09361.0936
N21.43861.18392.07972.07972.0797
C32.62251.18393.16323.16323.1632
H41.09362.07973.16321.78341.7834
H51.09362.07973.16321.78341.7834
H61.09362.07973.16321.78341.7834

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 109.686
N2 C1 H5 109.686 N2 C1 H6 109.686
H4 C1 H5 109.256 H4 C1 H6 109.256
H5 C1 H6 109.256
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability