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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B1B95/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B1B95/6-31G(2df,p)
 hartrees
Energy at 0K-132.700015
Energy at 298.15K-132.702642
HF Energy-132.700015
Nuclear repulsion energy58.677973
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 B1B95/6-31G(2df,p)
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 3083 2953 2.10 131.27 0.00 0.00
2 A1 2406 2304 10.17 51.16 0.25 0.40
3 A1 1403 1344 2.12 9.61 0.58 0.73
4 A1 950 910 1.20 4.04 0.15 0.26
5 E 3172 3037 0.43 61.90 0.75 0.86
5 E 3172 3037 0.43 61.90 0.75 0.86
6 E 1470 1408 9.47 12.88 0.75 0.86
6 E 1470 1408 9.47 12.88 0.75 0.86
7 E 1054 1009 3.19 0.03 0.75 0.86
7 E 1054 1009 3.19 0.03 0.75 0.86
8 E 397 380 0.69 2.54 0.75 0.86
8 E 397 380 0.69 2.54 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10013.6 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 9590.0 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 B1B95/6-31G(2df,p)
ABC
5.32782 0.31000 0.31000

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.172
C2 0.000 0.000 0.278
N3 0.000 0.000 1.430
H4 0.000 1.023 -1.549
H5 0.886 -0.511 -1.549
H6 -0.886 -0.511 -1.549

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45062.60251.09011.09011.0901
C21.45061.15202.09392.09392.0939
N32.60251.15203.14973.14973.1497
H41.09012.09393.14971.77191.7719
H51.09012.09393.14971.77191.7719
H61.09012.09393.14971.77191.7719

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 110.204
C2 C1 H5 110.204 C2 C1 H6 110.204
H4 C1 H5 108.728 H4 C1 H6 108.728
H5 C1 H6 108.728
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.519      
2 C 0.255      
3 N -0.300      
4 H 0.188      
5 H 0.188      
6 H 0.188      


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 -3.840 3.840
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.100 0.000 0.000
y 0.000 -17.100 0.000
z 0.000 0.000 -20.109
Traceless
 xyz
x 1.505 0.000 0.000
y 0.000 1.505 0.000
z 0.000 0.000 -3.009
Polar
3z2-r2-6.019
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 2.837 0.000 0.000
y 0.000 2.837 0.000
z 0.000 0.000 5.159


<r2> (average value of r2) Å2
<r2> 44.671
(<r2>)1/2 6.684