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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-131.927534
Energy at 298.15K-131.930253
HF Energy-131.927534
Nuclear repulsion energy58.888043
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 HF/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 3237 2908 4.87 128.99 0.00 0.00
2 A1 2623 2357 13.08 42.35 0.28 0.44
3 A1 1563 1405 0.64 8.07 0.66 0.80
4 A1 973 875 8.21 4.42 0.22 0.36
5 E 3317 2981 3.94 69.51 0.75 0.86
5 E 3317 2981 3.94 69.51 0.75 0.86
6 E 1617 1453 9.24 16.46 0.75 0.86
6 E 1617 1453 9.24 16.46 0.75 0.86
7 E 1174 1055 1.54 0.05 0.75 0.86
7 E 1174 1055 1.54 0.05 0.75 0.86
8 E 425 382 1.63 5.44 0.75 0.86
8 E 425 382 1.63 5.44 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10732.4 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 9643.0 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 HF/6-31G*
ABC
5.38063 0.31023 0.31023

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.178
C2 0.000 0.000 0.289
N3 0.000 0.000 1.424
H4 0.000 1.018 -1.545
H5 0.882 -0.509 -1.545
H6 -0.882 -0.509 -1.545

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46772.60251.08211.08211.0821
C21.46771.13472.09832.09832.0983
N32.60251.13473.13923.13923.1392
H41.08212.09833.13921.76311.7631
H51.08212.09833.13921.76311.7632
H61.08212.09833.13921.76311.7632

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 109.833
C2 C1 H5 109.833 C2 C1 H6 109.833
H4 C1 H5 109.108 H4 C1 H6 109.108
H5 C1 H6 109.108
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.531      
2 C 0.301      
3 N -0.454      
4 H 0.228      
5 H 0.228      
6 H 0.228      


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 -4.042 4.042
CHELPG 0.000 0.002 -4.024 4.024
AIM 0.000 0.000 2.824 2.824
ESP 0.000 -0.003 -4.065 4.065


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.508 0.000 0.000
y 0.000 -17.508 0.000
z 0.000 0.000 -20.908
Traceless
 xyz
x 1.700 0.000 0.000
y 0.000 1.700 0.000
z 0.000 0.000 -3.399
Polar
3z2-r2-6.799
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 2.514 0.000 0.000
y 0.000 2.514 0.000
z 0.000 0.000 4.709


<r2> (average value of r2) Å2
<r2> 44.948
(<r2>)1/2 6.704