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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: HF/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 HF/6-31+G**
 hartrees
Energy at 0K-131.936106
Energy at 298.15K-131.938823
HF Energy-131.936106
Nuclear repulsion energy58.873562
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 HF/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 3216 2908 5.46 151.60 0.00 0.00
2 A1 2606 2356 16.97 59.85 0.19 0.32
3 A1 1541 1393 0.60 5.47 0.71 0.83
4 A1 966 874 8.27 5.06 0.15 0.25
5 E 3301 2984 2.98 66.76 0.75 0.86
5 E 3301 2984 2.98 66.76 0.75 0.86
6 E 1597 1444 10.57 10.92 0.75 0.86
6 E 1597 1444 10.57 10.92 0.75 0.86
7 E 1162 1050 0.84 0.01 0.75 0.86
7 E 1162 1050 0.84 0.01 0.75 0.86
8 E 422 382 0.83 6.23 0.75 0.86
8 E 422 382 0.83 6.23 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10645.8 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 9626.0 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 HF/6-31+G**
ABC
5.36983 0.31016 0.31016

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/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 0.289
N3 0.000 0.000 1.424
H4 0.000 1.019 -1.543
H5 0.882 -0.509 -1.543
H6 -0.882 -0.509 -1.543

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46802.60351.08211.08211.0821
C21.46801.13552.09652.09652.0965
N32.60351.13553.13783.13783.1378
H41.08212.09653.13781.76491.7649
H51.08212.09653.13781.76491.7649
H61.08212.09653.13781.76491.7649

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 109.669
C2 C1 H5 109.669 C2 C1 H6 109.669
H4 C1 H5 109.273 H4 C1 H6 109.273
H5 C1 H6 109.273
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.323      
2 C 0.221      
3 N -0.451      
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 -4.229 4.229
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.828 0.000 0.000
y 0.000 -17.828 0.000
z 0.000 0.000 -21.252
Traceless
 xyz
x 1.712 0.000 0.000
y 0.000 1.712 0.000
z 0.000 0.000 -3.424
Polar
3z2-r2-6.848
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 2.840 0.000 0.000
y 0.000 2.840 0.000
z 0.000 0.000 5.204


<r2> (average value of r2) Å2
<r2> 45.153
(<r2>)1/2 6.720