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

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-131.930134
Energy at 298.15K-131.932579
Nuclear repulsion energy59.589175
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 B3PW91/3-21G
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 3065 2946 11.55      
2 A1 2203 2117 91.30      
3 A1 1480 1423 0.45      
4 A1 929 893 15.63      
5 E 3142 3020 7.06      
5 E 3142 3020 7.06      
6 E 1552 1492 15.07      
6 E 1552 1492 15.07      
7 E 1164 1119 0.14      
7 E 1164 1119 0.14      
8 E 299 288 3.11      
8 E 299 288 3.11      

Unscaled Zero Point Vibrational Energy (zpe) 9995.9 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 9608.0 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 B3PW91/3-21G
ABC
5.25834 0.33042 0.33042

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.117
N2 0.000 0.000 0.313
C3 0.000 0.000 1.496
H4 0.000 1.030 -1.488
H5 0.892 -0.515 -1.488
H6 -0.892 -0.515 -1.488

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.43032.61311.09441.09441.0944
N21.43031.18272.07462.07462.0746
C32.61311.18273.15643.15643.1564
H41.09442.07463.15641.78351.7835
H51.09442.07463.15641.78351.7835
H61.09442.07463.15641.78351.7835

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 109.795
N2 C1 H5 109.795 N2 C1 H6 109.795
H4 C1 H5 109.145 H4 C1 H6 109.145
H5 C1 H6 109.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.432      
2 N -0.555      
3 C 0.192      
4 H 0.265      
5 H 0.265      
6 H 0.265      


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 -3.780 3.780
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.532 0.000 0.000
y 0.000 -17.532 0.000
z 0.000 0.000 -20.650
Traceless
 xyz
x 1.559 0.000 0.000
y 0.000 1.559 0.000
z 0.000 0.000 -3.117
Polar
3z2-r2-6.235
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 2.532 0.000 0.000
y 0.000 2.532 0.000
z 0.000 0.000 4.897


<r2> (average value of r2) Å2
<r2> 43.022
(<r2>)1/2 6.559