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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-132.612365
Energy at 298.15K-132.614951
HF Energy-132.472888
Nuclear repulsion energy58.160470
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 B2PLYP/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 3102 2944 2.95 126.86 0.00 0.00
2 A1 2318 2200 1.94 39.60 0.29 0.45
3 A1 1458 1384 2.24 12.10 0.62 0.77
4 A1 939 891 2.07 3.88 0.21 0.34
5 E 3183 3022 1.65 66.29 0.75 0.86
5 E 3183 3022 1.65 66.29 0.75 0.86
6 E 1523 1446 10.19 17.17 0.75 0.86
6 E 1523 1446 10.19 17.17 0.75 0.86
7 E 1089 1033 2.73 0.15 0.75 0.86
7 E 1089 1033 2.73 0.15 0.75 0.86
8 E 376 356 0.57 3.88 0.75 0.86
8 E 376 356 0.57 3.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10079.2 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 9567.2 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 B2PLYP/6-31G*
ABC
5.30833 0.30406 0.30406

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.184
C2 0.000 0.000 0.278
N3 0.000 0.000 1.445
H4 0.000 1.025 -1.561
H5 0.888 -0.512 -1.561
H6 -0.888 -0.512 -1.561

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46252.62971.09191.09191.0919
C21.46251.16712.10562.10562.1056
N32.62971.16713.17633.17633.1763
H41.09192.10563.17631.77511.7751
H51.09192.10563.17631.77511.7751
H61.09192.10563.17631.77511.7751

picture of Acetonitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 N3 180.000 C2 C1 H4 110.185
C2 C1 H5 110.185 C2 C1 H6 110.185
H4 C1 H5 108.749 H4 C1 H6 108.749
H5 C1 H6 108.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.536      
2 C 0.314      
3 N -0.420      
4 H 0.214      
5 H 0.214      
6 H 0.214      


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 -3.789 3.789
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.339 0.000 0.000
y 0.000 -17.339 0.000
z 0.000 0.000 -20.544
Traceless
 xyz
x 1.602 0.000 0.000
y 0.000 1.602 0.000
z 0.000 0.000 -3.204
Polar
3z2-r2-6.409
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 2.567 0.000 0.000
y 0.000 2.567 0.000
z 0.000 0.000 4.946


<r2> (average value of r2) Å2
<r2> 45.461
(<r2>)1/2 6.742