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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-131.856378
Energy at 298.15K-131.859104
HF Energy-131.856378
Nuclear repulsion energy57.879418
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 PBEPBEultrafine/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 2992 2965 1.41 121.25 0.00 0.00
2 A1 2270 2249 2.55 39.09 0.31 0.47
3 A1 1427 1414 16.46 19.62 0.61 0.76
4 A1 917 909 0.57 2.97 0.19 0.31
5 E 3062 3034 1.03 65.43 0.75 0.86
5 E 3062 3034 1.03 65.43 0.75 0.86
6 E 1497 1483 15.12 21.89 0.75 0.86
6 E 1497 1483 15.12 21.89 0.75 0.86
7 E 1080 1070 6.16 0.00 0.75 0.86
7 E 1080 1070 6.16 0.00 0.75 0.86
8 E 449 445 0.42 3.39 0.75 0.86
8 E 449 445 0.42 3.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9890.3 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 9800.3 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 PBEPBEultrafine/3-21G
ABC
5.20687 0.30237 0.30237

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

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 0.275
N3 0.000 0.000 1.452
H4 0.000 1.035 -1.569
H5 0.896 -0.517 -1.569
H6 -0.896 -0.517 -1.569

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45832.63521.10421.10421.1042
C21.45831.17692.11422.11422.1142
N32.63521.17693.19293.19293.1929
H41.10422.11423.19291.79231.7923
H51.10422.11423.19291.79231.7923
H61.10422.11423.19291.79231.7923

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 110.426
C2 C1 H5 110.426 C2 C1 H6 110.426
H4 C1 H5 108.500 H4 C1 H6 108.500
H5 C1 H6 108.500
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.665      
2 C 0.340      
3 N -0.478      
4 H 0.268      
5 H 0.268      
6 H 0.268      


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 -3.575 3.575
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.351 0.000 0.000
y 0.000 -17.351 0.000
z 0.000 0.000 -20.179
Traceless
 xyz
x 1.414 0.000 0.000
y 0.000 1.414 0.000
z 0.000 0.000 -2.828
Polar
3z2-r2-5.656
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 2.348 0.000 0.000
y 0.000 2.348 0.000
z 0.000 0.000 4.830


<r2> (average value of r2) Å2
<r2> 45.632
(<r2>)1/2 6.755