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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: TPSSh/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at TPSSh/3-21G*
 hartrees
Energy at 0K-132.032276
Energy at 298.15K-132.035021
HF Energy-132.032276
Nuclear repulsion energy58.108311
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 TPSSh/3-21G*
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 3054 2950 2.14 121.77 0.00 0.00
2 A1 2321 2241 2.09 35.44 0.31 0.47
3 A1 1476 1425 11.82 17.59 0.62 0.76
4 A1 916 885 1.70 3.23 0.19 0.32
5 E 3122 3015 2.22 67.23 0.75 0.86
5 E 3122 3015 2.22 67.23 0.75 0.86
6 E 1545 1492 13.82 21.85 0.75 0.86
6 E 1545 1492 13.82 21.85 0.75 0.86
7 E 1118 1080 3.96 0.00 0.75 0.86
7 E 1118 1080 3.96 0.00 0.75 0.86
8 E 454 438 0.28 3.82 0.75 0.86
8 E 454 438 0.28 3.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10122.7 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 9775.5 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 TPSSh/3-21G*
ABC
5.26473 0.30409 0.30409

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.183
C2 0.000 0.000 0.277
N3 0.000 0.000 1.446
H4 0.000 1.029 -1.562
H5 0.891 -0.515 -1.562
H6 -0.891 -0.515 -1.562

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45972.62891.09651.09651.0965
C21.45971.16922.10672.10672.1067
N32.62891.16923.17873.17873.1787
H41.09652.10673.17871.78251.7825
H51.09652.10673.17871.78251.7825
H61.09652.10673.17871.78251.7825

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 110.196
C2 C1 H5 110.196 C2 C1 H6 110.196
H4 C1 H5 108.736 H4 C1 H6 108.736
H5 C1 H6 108.736
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.642      
2 C 0.336      
3 N -0.493      
4 H 0.266      
5 H 0.266      
6 H 0.266      


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 -3.642 3.642
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.329 0.000 0.000
y 0.000 2.329 0.000
z 0.000 0.000 4.722


<r2> (average value of r2) Å2
<r2> 45.458
(<r2>)1/2 6.742