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

using model chemistry: QCISD/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-132.474416
Energy at 298.15K-132.476789
HF Energy-131.943387
Nuclear repulsion energy60.020605
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/aug-cc-pVTZ
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 3079 2963 17.33      
2 A1 2234 2150 146.19      
3 A1 1477 1421 6.43      
4 A1 966 930 16.67      
5 E 3163 3044 4.63      
5 E 3163 3044 4.63      
6 E 1520 1463 9.91      
6 E 1520 1463 9.91      
7 E 1164 1121 0.46      
7 E 1164 1121 0.46      
8 E 265 255 0.30      
8 E 265 255 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 9990.1 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 9614.4 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/aug-cc-pVTZ
ABC
5.29929 0.33518 0.33518

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVTZ

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 0.314
C3 0.000 0.000 1.482
H4 0.000 1.026 -1.474
H5 0.888 -0.513 -1.474
H6 -0.888 -0.513 -1.474

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42422.59231.08781.08781.0878
N21.42421.16812.06042.06042.0604
C32.59231.16813.12803.12803.1280
H41.08782.06043.12801.77621.7762
H51.08782.06043.12801.77621.7762
H61.08782.06043.12801.77621.7762

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 109.487
N2 C1 H5 109.487 N2 C1 H6 109.487
H4 C1 H5 109.455 H4 C1 H6 109.455
H5 C1 H6 109.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability