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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-132.318383
Energy at 298.15K-132.320752
HF Energy-131.892006
Nuclear repulsion energy59.620453
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
(Å4/u)
Dep P Dep U
1 A1 3090 2943 18.05      
2 A1 2240 2133 120.97      
3 A1 1500 1429 4.46      
4 A1 978 931 19.02      
5 E 3177 3025 8.93      
5 E 3177 3025 8.93      
6 E 1538 1464 8.53      
6 E 1538 1464 8.53      
7 E 1173 1117 0.35      
7 E 1173 1117 0.35      
8 E 268 255 1.26      
8 E 268 255 1.26      

Unscaled Zero Point Vibrational Energy (zpe) 10059.5 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9579.6 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 QCISD/6-31G*
ABC
5.24135 0.33096 0.33096

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 -1.116
N2 0.000 0.000 0.313
C3 0.000 0.000 1.493
H4 0.000 1.031 -1.483
H5 0.893 -0.516 -1.483
H6 -0.893 -0.516 -1.483

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42902.60931.09431.09431.0943
N21.42901.18032.07042.07042.0704
C32.60931.18033.14933.14933.1493
H41.09432.07043.14931.78601.7860
H51.09432.07043.14931.78601.7860
H61.09432.07043.14931.78601.7860

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 109.560
N2 C1 H5 109.560 N2 C1 H6 109.560
H4 C1 H5 109.382 H4 C1 H6 109.382
H5 C1 H6 109.382
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability