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

using model chemistry: CISD/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 CISD/6-31G*
 hartrees
Energy at 0K-132.272559
Energy at 298.15K-132.274983
HF Energy-131.893488
Nuclear repulsion energy59.999928
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 CISD/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 3162 2928 18.69      
2 A1 2337 2163 142.79      
3 A1 1535 1421 5.58      
4 A1 1003 929 22.51      
5 E 3250 3009 8.55      
5 E 3250 3009 8.55      
6 E 1570 1454 8.79      
6 E 1570 1454 8.79      
7 E 1202 1113 0.41      
7 E 1202 1113 0.41      
8 E 284 263 1.43      
8 E 284 263 1.43      

Unscaled Zero Point Vibrational Energy (zpe) 10324.6 cm-1
Scaled (by 0.9258) Zero Point Vibrational Energy (zpe) 9558.6 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 CISD/6-31G*
ABC
5.30031 0.33501 0.33501

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.111
N2 0.000 0.000 0.313
C3 0.000 0.000 1.484
H4 0.000 1.026 -1.475
H5 0.888 -0.513 -1.475
H6 -0.888 -0.513 -1.475

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42402.59541.08831.08821.0882
N21.42401.17142.06112.06112.0611
C32.59541.17143.13193.13193.1319
H41.08832.06113.13191.77651.7765
H51.08822.06113.13191.77651.7765
H61.08822.06113.13191.77651.7765

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 109.530
N2 C1 H5 109.530 N2 C1 H6 109.530
H4 C1 H5 109.412 H4 C1 H6 109.412
H5 C1 H6 109.412
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability