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

using model chemistry: QCISD/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-132.411001
Energy at 298.15K-132.413413
HF Energy-131.908385
Nuclear repulsion energy59.946633
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(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3105 2942 14.45      
2 A1 2244 2126 128.67      
3 A1 1490 1411 5.83      
4 A1 977 926 15.54      
5 E 3192 3024 4.92      
5 E 3192 3024 4.92      
6 E 1523 1443 8.13      
6 E 1523 1443 8.13      
7 E 1172 1110 0.13      
7 E 1172 1110 0.13      
8 E 282 267 0.27      
8 E 282 267 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 10075.9 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 9545.9 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(2df,p)
ABC
5.28933 0.33462 0.33462

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.110
N2 0.000 0.000 0.312
C3 0.000 0.000 1.484
H4 0.000 1.027 -1.477
H5 0.889 -0.513 -1.477
H6 -0.889 -0.513 -1.477

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42272.59441.09041.09041.0904
N21.42271.17172.06292.06292.0629
C32.59441.17173.13383.13383.1338
H41.09042.06293.13381.77871.7787
H51.09042.06293.13381.77871.7787
H61.09042.06293.13381.77871.7787

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 109.637
N2 C1 H5 109.637 N2 C1 H6 109.637
H4 C1 H5 109.305 H4 C1 H6 109.305
H5 C1 H6 109.305
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability