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

using model chemistry: B3PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/6-311G**
 hartrees
Energy at 0K-132.695810
Energy at 298.15K-132.698214
Nuclear repulsion energy60.119955
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 B3PW91/6-311G**
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 2941 16.19      
2 A1 2247 2164 126.10      
3 A1 1447 1394 2.60      
4 A1 976 940 11.31      
5 E 3135 3019 6.62      
5 E 3135 3019 6.62      
6 E 1485 1431 12.20      
6 E 1485 1431 12.20      
7 E 1141 1098 0.01      
7 E 1141 1098 0.01      
8 E 281 271 0.80      
8 E 281 271 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 9903.4 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 9538.0 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 B3PW91/6-311G**
ABC
5.28621 0.33707 0.33707

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.105
N2 0.000 0.000 0.310
C3 0.000 0.000 1.481
H4 0.000 1.027 -1.476
H5 0.889 -0.514 -1.476
H6 -0.889 -0.514 -1.476

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.41552.58551.09181.09181.0918
N21.41551.17002.06032.06032.0603
C32.58551.17003.12943.12943.1294
H41.09182.06033.12941.77881.7788
H51.09182.06033.12941.77881.7788
H61.09182.06033.12941.77881.7788

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 109.844
N2 C1 H5 109.844 N2 C1 H6 109.844
H4 C1 H5 109.096 H4 C1 H6 109.096
H5 C1 H6 109.096
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.187      
2 N -0.227      
3 C -0.060      
4 H 0.158      
5 H 0.158      
6 H 0.158      


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 -3.872 3.872
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.632 0.000 0.000
y 0.000 -17.632 0.000
z 0.000 0.000 -21.164
Traceless
 xyz
x 1.766 0.000 0.000
y 0.000 1.766 0.000
z 0.000 0.000 -3.532
Polar
3z2-r2-7.063
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 3.040 0.000 0.000
y 0.000 3.040 0.000
z 0.000 0.000 5.508


<r2> (average value of r2) Å2
<r2> 42.596
(<r2>)1/2 6.527