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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B1B95/6-31+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 B1B95/6-31+G**
 hartrees
Energy at 0K-132.699749
Energy at 298.15K-132.702348
HF Energy-132.699749
Nuclear repulsion energy58.517231
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 B1B95/6-31+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 3090 2955 2.51 166.54 0.00 0.01
2 A1 2402 2298 12.58 68.83 0.22 0.36
3 A1 1410 1349 3.92 9.21 0.68 0.81
4 A1 950 908 1.62 4.05 0.12 0.22
5 E 3179 3041 0.33 68.25 0.75 0.86
5 E 3179 3041 0.33 68.25 0.75 0.86
6 E 1477 1413 12.86 10.47 0.75 0.86
6 E 1477 1413 12.86 10.47 0.75 0.86
7 E 1055 1009 2.48 0.01 0.75 0.86
7 E 1055 1009 2.48 0.01 0.75 0.86
8 E 383 367 0.12 4.67 0.75 0.86
8 E 383 367 0.12 4.67 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10019.7 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 9584.8 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 B1B95/6-31+G**
ABC
5.31532 0.30824 0.30824

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31+G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.176
C2 0.000 0.000 0.278
N3 0.000 0.000 1.435
H4 0.000 1.024 -1.550
H5 0.887 -0.512 -1.550
H6 -0.887 -0.512 -1.550

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45382.61111.09041.09041.0904
C21.45381.15732.09532.09532.0953
N32.61111.15733.15613.15613.1561
H41.09042.09533.15611.77391.7739
H51.09042.09533.15611.77391.7739
H61.09042.09533.15611.77391.7739

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 110.067
C2 C1 H5 110.067 C2 C1 H6 110.067
H4 C1 H5 108.869 H4 C1 H6 108.869
H5 C1 H6 108.869
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.497      
2 C 0.338      
3 N -0.467      
4 H 0.209      
5 H 0.209      
6 H 0.209      


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 -4.054 4.054
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 -20.799
Traceless
 xyz
x 1.592 0.000 0.000
y 0.000 1.592 0.000
z 0.000 0.000 -3.184
Polar
3z2-r2-6.368
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 2.975 0.000 0.000
y 0.000 2.975 0.000
z 0.000 0.000 5.678


<r2> (average value of r2) Å2
<r2> 45.198
(<r2>)1/2 6.723