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

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-132.680197
Energy at 298.15K-132.682613
Nuclear repulsion energy60.079443
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**
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 3082 2933 17.42      
2 A1 2279 2169 120.52      
3 A1 1468 1397 3.32      
4 A1 995 947 11.99      
5 E 3170 3016 6.52      
5 E 3170 3016 6.52      
6 E 1504 1431 10.22      
6 E 1504 1431 10.22      
7 E 1153 1097 0.01      
7 E 1153 1097 0.01      
8 E 286 272 1.05      
8 E 286 272 1.05      

Unscaled Zero Point Vibrational Energy (zpe) 10024.1 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 9537.9 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 mPW1PW91/6-31G**
ABC
5.29918 0.33675 0.33675

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.104
N2 0.000 0.000 0.308
C3 0.000 0.000 1.483
H4 0.000 1.026 -1.478
H5 0.888 -0.513 -1.478
H6 -0.888 -0.513 -1.478

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.41202.58671.09171.09171.0917
N21.41201.17472.05942.05942.0594
C32.58671.17473.13323.13323.1332
H41.09172.05943.13321.77661.7766
H51.09172.05943.13321.77661.7766
H61.09172.05943.13321.77661.7766

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 110.022
N2 C1 H5 110.022 N2 C1 H6 110.022
H4 C1 H5 108.915 H4 C1 H6 108.915
H5 C1 H6 108.915
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.264      
2 N -0.240      
3 C -0.041      
4 H 0.181      
5 H 0.181      
6 H 0.181      


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 -3.659 3.659
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.360 0.000 0.000
y 0.000 -17.360 0.000
z 0.000 0.000 -20.651
Traceless
 xyz
x 1.646 0.000 0.000
y 0.000 1.646 0.000
z 0.000 0.000 -3.291
Polar
3z2-r2-6.582
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 2.806 0.000 0.000
y 0.000 2.806 0.000
z 0.000 0.000 5.266


<r2> (average value of r2) Å2
<r2> 42.404
(<r2>)1/2 6.512