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

using model chemistry: mPW1PW91/6-31G(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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-132.687103
Energy at 298.15K-132.689522
Nuclear repulsion energy60.234927
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 mPW1PW91/6-31G(2df,p)
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 3073 2934 16.09      
2 A1 2267 2164 125.59      
3 A1 1460 1394 4.22      
4 A1 992 947 10.02      
5 E 3159 3015 5.19      
5 E 3159 3015 5.19      
6 E 1492 1424 9.30      
6 E 1492 1424 9.30      
7 E 1152 1100 0.01      
7 E 1152 1100 0.01      
8 E 286 273 0.25      
8 E 286 273 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 9984.0 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 9531.7 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 mPW1PW91/6-31G(2df,p)
ABC
5.30118 0.33867 0.33867

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.100
N2 0.000 0.000 0.309
C3 0.000 0.000 1.478
H4 0.000 1.026 -1.475
H5 0.888 -0.513 -1.475
H6 -0.888 -0.513 -1.475

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.40912.57841.09181.09181.0918
N21.40911.16942.05742.05742.0574
C32.57841.16943.12593.12593.1259
H41.09182.05743.12591.77631.7763
H51.09182.05743.12591.77631.7763
H61.09182.05743.12591.77631.7763

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 110.058
N2 C1 H5 110.058 N2 C1 H6 110.058
H4 C1 H5 108.878 H4 C1 H6 108.878
H5 C1 H6 108.878
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.347      
2 N 0.009      
3 C -0.226      
4 H 0.188      
5 H 0.188      
6 H 0.188      


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 -3.715 3.715
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.349 0.000 0.000
y 0.000 -17.349 0.000
z 0.000 0.000 -20.826
Traceless
 xyz
x 1.738 0.000 0.000
y 0.000 1.738 0.000
z 0.000 0.000 -3.477
Polar
3z2-r2-6.953
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 3.031 0.000 0.000
y 0.000 3.031 0.000
z 0.000 0.000 5.397


<r2> (average value of r2) Å2
<r2> 42.280
(<r2>)1/2 6.502