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

using model chemistry: B3PW91/6-31G(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 B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-132.670904
Energy at 298.15K-132.673312
Nuclear repulsion energy60.132830
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 B3PW91/6-31G(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 3054 2936 16.52      
2 A1 2246 2159 120.38      
3 A1 1451 1395 4.23      
4 A1 983 945 9.52      
5 E 3138 3017 5.67      
5 E 3138 3017 5.67      
6 E 1483 1426 9.08      
6 E 1483 1426 9.09      
7 E 1145 1101 0.02      
7 E 1145 1101 0.02      
8 E 283 272 0.23      
8 E 283 272 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 9916.0 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 9533.2 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 B3PW91/6-31G(2df,p)
ABC
5.28665 0.33753 0.33753

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

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 0.309
C3 0.000 0.000 1.481
H4 0.000 1.027 -1.478
H5 0.889 -0.513 -1.478
H6 -0.889 -0.513 -1.478

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.41102.58281.09351.09351.0935
N21.41101.17182.06062.06062.0606
C32.58281.17183.13153.13153.1315
H41.09352.06063.13151.77881.7788
H51.09352.06063.13151.77881.7788
H61.09352.06063.13151.77881.7788

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 110.085
N2 C1 H5 110.085 N2 C1 H6 110.085
H4 C1 H5 108.850 H4 C1 H6 108.850
H5 C1 H6 108.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.346      
2 N 0.017      
3 C -0.229      
4 H 0.186      
5 H 0.186      
6 H 0.186      


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 -3.725 3.725
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.354 0.000 0.000
y 0.000 -17.354 0.000
z 0.000 0.000 -20.872
Traceless
 xyz
x 1.759 0.000 0.000
y 0.000 1.759 0.000
z 0.000 0.000 -3.518
Polar
3z2-r2-7.035
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 3.046 0.000 0.000
y 0.000 3.046 0.000
z 0.000 0.000 5.452


<r2> (average value of r2) Å2
<r2> 42.396
(<r2>)1/2 6.511