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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: TPSSh/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at TPSSh/6-31G**
 hartrees
Energy at 0K-132.763462
Energy at 298.15K-132.766053
HF Energy-132.763462
Nuclear repulsion energy58.218321
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/6-31G**
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 3062 2936 3.92 145.26 0.00 0.00
2 A1 2353 2256 7.31 49.34 0.30 0.46
3 A1 1426 1367 1.82 13.40 0.59 0.74
4 A1 930 892 1.60 3.65 0.19 0.32
5 E 3143 3013 2.55 71.96 0.75 0.86
5 E 3143 3013 2.55 71.96 0.75 0.86
6 E 1498 1436 9.26 16.94 0.75 0.86
6 E 1498 1436 9.26 16.94 0.75 0.86
7 E 1064 1020 2.25 0.08 0.75 0.86
7 E 1064 1020 2.25 0.08 0.75 0.86
8 E 381 365 0.32 4.00 0.75 0.86
8 E 381 365 0.32 4.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9971.8 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 9559.9 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/6-31G**
ABC
5.28912 0.30484 0.30484

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

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 0.279
N3 0.000 0.000 1.443
H4 0.000 1.027 -1.559
H5 0.889 -0.513 -1.559
H6 -0.889 -0.513 -1.559

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46172.62601.09331.09331.0933
C21.46171.16432.10492.10492.1049
N32.62601.16433.17263.17263.1726
H41.09332.10493.17261.77831.7783
H51.09332.10493.17261.77831.7783
H61.09332.10493.17261.77831.7783

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 110.104
C2 C1 H5 110.104 C2 C1 H6 110.104
H4 C1 H5 108.831 H4 C1 H6 108.831
H5 C1 H6 108.831
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.422      
2 C 0.348      
3 N -0.478      
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 -3.832 3.832
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 2.633 0.000 0.000
y 0.000 2.633 0.000
z 0.000 0.000 5.175


<r2> (average value of r2) Å2
<r2> 45.267
(<r2>)1/2 6.728