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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-132.708899
Energy at 298.15K-132.711491
HF Energy-132.708899
Nuclear repulsion energy58.367256
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 B3PW91/6-31+G**
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 3070 2947 2.72      
2 A1 2376 2281 12.31      
3 A1 1408 1351 4.38      
4 A1 942 905 1.40      
5 E 3157 3031 0.43      
5 E 3157 3031 0.43      
6 E 1472 1413 13.05      
6 E 1472 1413 13.05      
7 E 1054 1012 2.61      
7 E 1054 1012 2.61      
8 E 381 366 0.09      
8 E 381 366 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 9961.5 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 9564.0 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 B3PW91/6-31+G**
ABC
5.28972 0.30672 0.30672

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.179
C2 0.000 0.000 0.278
N3 0.000 0.000 1.439
H4 0.000 1.027 -1.555
H5 0.889 -0.513 -1.555
H6 -0.889 -0.513 -1.555

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45662.61741.09341.09341.0934
C21.45661.16082.10062.10062.1006
N32.61741.16083.16463.16463.1646
H41.09342.10063.16461.77821.7782
H51.09342.10063.16461.77821.7782
H61.09342.10063.16461.77821.7782

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 110.116
C2 C1 H5 110.116 C2 C1 H6 110.116
H4 C1 H5 108.819 H4 C1 H6 108.819
H5 C1 H6 108.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.508      
2 C 0.332      
3 N -0.466      
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 -4.075 4.075
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.615 0.000 0.000
y 0.000 -17.615 0.000
z 0.000 0.000 -20.792
Traceless
 xyz
x 1.589 0.000 0.000
y 0.000 1.589 0.000
z 0.000 0.000 -3.177
Polar
3z2-r2-6.355
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 2.990 0.000 0.000
y 0.000 2.990 0.000
z 0.000 0.000 5.726


<r2> (average value of r2) Å2
<r2> 45.365
(<r2>)1/2 6.735