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

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-131.948277
Energy at 298.15K-131.950768
HF Energy-131.948277
Nuclear repulsion energy60.734113
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/Def2TZVPP
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 3201 2901 25.69      
2 A1 2448 2219 239.99      
3 A1 1581 1433 13.27      
4 A1 1005 911 32.23      
5 E 3277 2970 12.30      
5 E 3277 2970 12.30      
6 E 1613 1462 9.34      
6 E 1613 1462 9.34      
7 E 1253 1136 0.96      
7 E 1253 1136 0.96      
8 E 302 274 0.99      
8 E 302 274 0.99      

Unscaled Zero Point Vibrational Energy (zpe) 10562.2 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 9573.6 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 HF/Def2TZVPP
ABC
5.38705 0.34259 0.34259

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.102
N2 0.000 0.000 0.318
C3 0.000 0.000 1.462
H4 0.000 1.017 -1.463
H5 0.881 -0.509 -1.463
H6 -0.881 -0.509 -1.463

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.42032.56381.07941.07941.0794
N21.42031.14362.05102.05102.0510
C32.56381.14363.09643.09643.0964
H41.07942.05103.09641.76211.7621
H51.07942.05103.09641.76211.7621
H61.07942.05103.09641.76211.7621

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 109.520
N2 C1 H5 109.520 N2 C1 H6 109.520
H4 C1 H5 109.422 H4 C1 H6 109.422
H5 C1 H6 109.422
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.014      
2 N -0.180      
3 C -0.106      
4 H 0.100      
5 H 0.100      
6 H 0.100      


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 -3.758 3.758
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.908 0.000 0.000
y 0.000 -17.908 0.000
z 0.000 0.000 -21.448
Traceless
 xyz
x 1.770 0.000 0.000
y 0.000 1.770 0.000
z 0.000 0.000 -3.541
Polar
3z2-r2-7.081
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 3.336 0.000 0.000
y 0.000 3.336 0.000
z 0.000 0.000 5.425


<r2> (average value of r2) Å2
<r2> 42.263
(<r2>)1/2 6.501