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

using model chemistry: QCISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-132.366452
Energy at 298.15K-132.368827
HF Energy-131.921595
Nuclear repulsion energy59.762092
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/6-311G*
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 3070 2940 18.50      
2 A1 2226 2131 130.92      
3 A1 1488 1424 3.26      
4 A1 973 932 18.88      
5 E 3157 3022 8.77      
5 E 3157 3022 8.77      
6 E 1523 1458 10.97      
6 E 1523 1458 10.97      
7 E 1166 1116 0.21      
7 E 1166 1116 0.21      
8 E 268 257 0.75      
8 E 268 257 0.75      

Unscaled Zero Point Vibrational Energy (zpe) 9992.1 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 9566.4 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/6-311G*
ABC
5.24884 0.33246 0.33246

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.116
N2 0.000 0.000 0.313
C3 0.000 0.000 1.490
H4 0.000 1.031 -1.479
H5 0.893 -0.515 -1.479
H6 -0.893 -0.515 -1.479

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42942.60581.09281.09281.0928
N21.42941.17642.06792.06792.0679
C32.60581.17643.14303.14303.1430
H41.09282.06793.14301.78511.7851
H51.09282.06793.14301.78511.7851
H61.09282.06793.14301.78511.7851

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 109.420
N2 C1 H5 109.420 N2 C1 H6 109.420
H4 C1 H5 109.522 H4 C1 H6 109.522
H5 C1 H6 109.522
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability