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

using model chemistry: CCSD(T)/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 CCSD(T)/6-31G*
 hartrees
Energy at 0K-132.332753
Energy at 298.15K-132.335100
HF Energy-131.891259
Nuclear repulsion energy59.479048
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 CCSD(T)/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 3076 2960        
2 A1 2203 2120        
3 A1 1490 1434        
4 A1 966 930        
5 E 3163 3043        
5 E 3163 3043        
6 E 1531 1473        
6 E 1531 1473        
7 E 1165 1121        
7 E 1165 1121        
8 E 261 252        
8 E 261 251        

Unscaled Zero Point Vibrational Energy (zpe) 9988.2 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 9609.6 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 CCSD(T)/6-31G*
ABC
5.22872 0.32937 0.32937

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.120
N2 0.000 0.000 0.312
C3 0.000 0.000 1.499
H4 0.000 1.033 -1.485
H5 0.894 -0.516 -1.485
H6 -0.894 -0.516 -1.485

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43182.61901.09521.09521.0952
N21.43181.18732.07232.07232.0723
C32.61901.18733.15763.15763.1576
H41.09522.07233.15761.78861.7886
H51.09522.07233.15761.78861.7886
H61.09522.07233.15761.78861.7886

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 109.466
N2 C1 H5 109.466 N2 C1 H6 109.466
H4 C1 H5 109.477 H4 C1 H6 109.477
H5 C1 H6 109.477
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability