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

using model chemistry: QCISD(T)/6-31+G**

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(T)/6-31+G**
 hartrees
Energy at 0K-132.351875
Energy at 298.15K-132.354235
HF Energy-131.902608
Nuclear repulsion energy59.544434
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(T)/6-31+G**
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 3111 2921        
2 A1 2189 2056        
3 A1 1487 1397        
4 A1 956 898        
5 E 3207 3011        
5 E 3207 3011        
6 E 1531 1438        
6 E 1531 1438        
7 E 1165 1094        
7 E 1165 1094        
8 E 264 248        
8 E 264 248        

Unscaled Zero Point Vibrational Energy (zpe) 10038.6 cm-1
Scaled (by 0.939) Zero Point Vibrational Energy (zpe) 9426.3 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(T)/6-31+G**
ABC
5.27353 0.32957 0.32957

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.122
N2 0.000 0.000 0.312
C3 0.000 0.000 1.498
H4 0.000 1.028 -1.481
H5 0.890 -0.514 -1.481
H6 -0.890 -0.514 -1.481

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43352.61981.08921.08921.0892
N21.43351.18632.06682.06682.0668
C32.61981.18633.15173.15173.1517
H41.08922.06683.15171.78101.7810
H51.08922.06683.15171.78101.7810
H61.08922.06683.15171.78101.7810

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 109.266
N2 C1 H5 109.266 N2 C1 H6 109.266
H4 C1 H5 109.675 H4 C1 H6 109.675
H5 C1 H6 109.675
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability