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

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-22.777205
Energy at 298.15K-22.779603
HF Energy-22.370628
Nuclear repulsion energy31.970218
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 MP2/CEP-121G*
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 3100 2954 20.02      
2 A1 2122 2022 86.92      
3 A1 1488 1418 4.98      
4 A1 949 904 22.48      
5 E 3212 3061 7.10      
5 E 3212 3061 7.10      
6 E 1528 1456 10.46      
6 E 1528 1456 10.46      
7 E 1164 1109 0.46      
7 E 1164 1109 0.46      
8 E 280 267 0.44      
8 E 280 267 0.44      

Unscaled Zero Point Vibrational Energy (zpe) 10014.4 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 9541.7 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 MP2/CEP-121G*
ABC
5.23502 0.32638 0.32638

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.128
N2 0.000 0.000 0.312
C3 0.000 0.000 1.506
H4 0.000 1.032 -1.484
H5 0.894 -0.516 -1.484
H6 -0.894 -0.516 -1.484

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43972.63451.09151.09151.0915
N21.43971.19482.07062.07062.0706
C32.63451.19483.16303.16303.1630
H41.09152.07063.16301.78751.7875
H51.09152.07063.16301.78751.7875
H61.09152.07063.16301.78751.7875

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 109.001
N2 C1 H5 109.001 N2 C1 H6 109.001
H4 C1 H5 109.937 H4 C1 H6 109.937
H5 C1 H6 109.937
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability