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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: PBEPBE/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 PBEPBE/6-31G**
 hartrees
Energy at 0K-132.586671
Energy at 298.15K-132.589229
HF Energy-132.586671
Nuclear repulsion energy57.970081
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 PBEPBE/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 2995 2954 2.37      
2 A1 2296 2264 7.40      
3 A1 1366 1347 4.22      
4 A1 926 913 0.59      
5 E 3077 3035 0.76      
5 E 3077 3035 0.76      
6 E 1434 1414 10.64      
6 E 1434 1414 10.64      
7 E 1021 1007 4.06      
7 E 1021 1007 4.06      
8 E 375 370 0.16      
8 E 375 370 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 9698.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 9565.4 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 PBEPBE/6-31G**
ABC
5.22437 0.30301 0.30301

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/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 0.276
N3 0.000 0.000 1.449
H4 0.000 1.033 -1.566
H5 0.895 -0.517 -1.566
H6 -0.895 -0.517 -1.566

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45992.63271.10171.10171.1017
C21.45991.17282.11252.11252.1125
N32.63271.17283.18753.18753.1875
H41.10172.11253.18751.78931.7893
H51.10172.11253.18751.78931.7893
H61.10172.11253.18751.78931.7893

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 110.331
C2 C1 H5 110.331 C2 C1 H6 110.331
H4 C1 H5 108.598 H4 C1 H6 108.598
H5 C1 H6 108.598
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.435      
2 C 0.335      
3 N -0.452      
4 H 0.184      
5 H 0.184      
6 H 0.184      


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 -3.780 3.780
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.231 0.000 0.000
y 0.000 -17.231 0.000
z 0.000 0.000 -20.107
Traceless
 xyz
x 1.438 0.000 0.000
y 0.000 1.438 0.000
z 0.000 0.000 -2.875
Polar
3z2-r2-5.751
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 2.662 0.000 0.000
y 0.000 2.662 0.000
z 0.000 0.000 5.313


<r2> (average value of r2) Å2
<r2> 45.486
(<r2>)1/2 6.744