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

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-132.342165
Energy at 298.15K-132.344539
HF Energy-131.896935
Nuclear repulsion energy59.700151
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/6-31G**
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 3129 2946 20.79      
2 A1 2241 2110 123.86      
3 A1 1507 1418 8.50      
4 A1 979 922 18.76      
5 E 3221 3033 10.30      
5 E 3221 3033 10.30      
6 E 1549 1458 6.83      
6 E 1549 1458 6.83      
7 E 1178 1109 0.81      
7 E 1178 1109 0.81      
8 E 267 251 1.18      
8 E 267 251 1.18      

Unscaled Zero Point Vibrational Energy (zpe) 10142.6 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 9548.2 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/6-31G**
ABC
5.30246 0.33135 0.33135

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.117
N2 0.000 0.000 0.312
C3 0.000 0.000 1.494
H4 0.000 1.025 -1.481
H5 0.888 -0.513 -1.481
H6 -0.888 -0.513 -1.481

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42882.61141.08801.08801.0880
N21.42881.18262.06522.06522.0652
C32.61141.18263.14693.14693.1469
H41.08802.06523.14691.77611.7761
H51.08802.06523.14691.77611.7761
H61.08802.06523.14691.77611.7761

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 109.533
N2 C1 H5 109.533 N2 C1 H6 109.533
H4 C1 H5 109.409 H4 C1 H6 109.409
H5 C1 H6 109.409
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability