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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: HF/STO-3G

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/STO-3G
 hartrees
Energy at 0K-130.271542
Energy at 298.15K-130.274196
HF Energy-130.271542
Nuclear repulsion energy58.122145
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/STO-3G
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 3569 2914 0.44 47.07 0.00 0.00
2 A1 2767 2259 6.45 13.73 0.23 0.37
3 A1 1698 1386 0.21 8.32 0.71 0.83
4 A1 1038 848 5.85 4.45 0.26 0.42
5 E 3744 3057 3.59 32.40 0.75 0.86
5 E 3744 3057 3.59 32.40 0.75 0.86
6 E 1784 1456 6.25 17.42 0.75 0.86
6 E 1784 1456 6.25 17.42 0.75 0.86
7 E 1257 1026 1.99 0.24 0.75 0.86
7 E 1257 1026 1.99 0.24 0.75 0.86
8 E 438 357 1.40 2.55 0.75 0.86
8 E 438 357 1.40 2.55 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11757.3 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 9599.8 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/STO-3G
ABC
5.32718 0.30164 0.30164

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.195
C2 0.000 0.000 0.291
N3 0.000 0.000 1.446
H4 0.000 1.023 -1.566
H5 0.886 -0.512 -1.566
H6 -0.886 -0.512 -1.566

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.48632.64061.08841.08841.0884
C21.48631.15422.12072.12072.1207
N32.64061.15423.18093.18093.1809
H41.08842.12073.18091.77201.7720
H51.08842.12073.18091.77201.7720
H61.08842.12073.18091.77201.7720

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 109.950
C2 C1 H5 109.950 C2 C1 H6 109.950
H4 C1 H5 108.989 H4 C1 H6 108.989
H5 C1 H6 108.989
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.181      
2 C 0.075      
3 N -0.198      
4 H 0.101      
5 H 0.101      
6 H 0.101      


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 -3.096 3.096
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.210 0.000 0.000
y 0.000 -16.210 0.000
z 0.000 0.000 -19.720
Traceless
 xyz
x 1.755 0.000 0.000
y 0.000 1.755 0.000
z 0.000 0.000 -3.510
Polar
3z2-r2-7.020
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 1.177 0.000 0.000
y 0.000 1.177 0.000
z 0.000 0.000 2.821


<r2> (average value of r2) Å2
<r2> 45.060
(<r2>)1/2 6.713