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

using model chemistry: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-22.308084
Energy at 298.15K-22.310669
Nuclear repulsion energy32.266790
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 HF/CEP-121G
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 3187 2908 42.77      
2 A1 2352 2146 258.08      
3 A1 1593 1454 7.05      
4 A1 993 906 39.70      
5 E 3291 3003 24.14      
5 E 3291 3003 24.14      
6 E 1633 1490 12.67      
6 E 1633 1490 12.67      
7 E 1267 1156 1.97      
7 E 1267 1156 1.97      
8 E 339 309 6.18      
8 E 339 309 6.18      

Unscaled Zero Point Vibrational Energy (zpe) 10592.3 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 9665.5 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 HF/CEP-121G
ABC
5.36305 0.33171 0.33171

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

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 0.318
C3 0.000 0.000 1.489
H4 0.000 1.020 -1.483
H5 0.883 -0.510 -1.483
H6 -0.883 -0.510 -1.483

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43792.60891.08231.08231.0823
N21.43791.17092.06952.06952.0695
C32.60891.17093.14193.14193.1419
H41.08232.06953.14191.76601.7660
H51.08232.06953.14191.76601.7660
H61.08232.06953.14191.76601.7660

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 109.596
N2 C1 H5 109.596 N2 C1 H6 109.596
H4 C1 H5 109.346 H4 C1 H6 109.346
H5 C1 H6 109.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.279      
2 N -0.080      
3 C -0.203      
4 H 0.187      
5 H 0.187      
6 H 0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.774 3.774
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.918 0.000 0.000
y 0.000 -17.918 0.000
z 0.000 0.000 -21.724
Traceless
 xyz
x 1.903 0.000 0.000
y 0.000 1.903 0.000
z 0.000 0.000 -3.807
Polar
3z2-r2-7.614
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.926 0.000 0.000
y 0.000 2.926 0.000
z 0.000 0.000 5.048


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000