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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B1B95/CEP-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 B1B95/CEP-31G*
 hartrees
Energy at 0K-22.951227
Energy at 298.15K-22.953790
Nuclear repulsion energy30.803729
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/CEP-31G*
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 3098 2966 3.90      
2 A1 2380 2278 15.24      
3 A1 1402 1342 3.65      
4 A1 945 904 2.25      
5 E 3189 3053 4.26      
5 E 3189 3053 4.30      
6 E 1467 1404 13.84      
6 E 1467 1404 13.82      
7 E 1039 995 2.59      
7 E 1039 995 2.59      
8 E 374 358 0.00      
8 E 374 358 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 9981.8 cm-1
Scaled (by 0.9572) Zero Point Vibrational Energy (zpe) 9554.6 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/CEP-31G*
ABC
5.20448 0.29768 0.29768

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.199
C2 0.000 0.000 0.282
N3 0.000 0.000 1.460
H4 0.000 1.035 -1.572
H5 0.896 -0.518 -1.572
H6 -0.896 -0.518 -1.572

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.48132.65961.10001.10001.1000
C21.48131.17832.12312.12312.1231
N32.65961.17833.20393.20393.2039
H41.10002.12313.20391.79271.7927
H51.10002.12313.20391.79271.7927
H61.10002.12313.20391.79271.7927

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 109.791
C2 C1 H5 109.791 C2 C1 H6 109.791
H4 C1 H5 109.150 H4 C1 H6 109.150
H5 C1 H6 109.150
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.331      
2 C -0.602      
3 N 0.394      
4 H 0.180      
5 H 0.180      
6 H 0.180      


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 -3.947 3.947
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.200 0.000 0.000
y 0.000 -17.200 0.000
z 0.000 0.000 -20.209
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-r2-6.018
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 2.686 0.000 0.000
y 0.000 2.688 0.000
z 0.000 0.000 5.234


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000