return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: B2PLYP/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 B2PLYP/6-31G(2df,p)
 hartrees
Energy at 0K-132.646716
Energy at 298.15K-132.649326
HF Energy-132.483646
Nuclear repulsion energy58.359227
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 B2PLYP/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 3090 2950 2.51 125.66 0.00 0.00
2 A1 2312 2208 2.75 42.85 0.25 0.39
3 A1 1424 1360 1.25 8.95 0.58 0.73
4 A1 932 890 1.41 4.18 0.15 0.27
5 E 3173 3030 0.74 60.26 0.75 0.86
5 E 3173 3030 0.74 60.26 0.75 0.86
6 E 1492 1425 8.85 12.93 0.75 0.86
6 E 1492 1425 8.85 12.93 0.75 0.86
7 E 1070 1022 2.44 0.04 0.75 0.86
7 E 1070 1022 2.44 0.04 0.75 0.86
8 E 387 369 0.76 2.50 0.75 0.86
8 E 387 369 0.76 2.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10000.4 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 9550.4 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 B2PLYP/6-31G(2df,p)
ABC
5.32044 0.30627 0.30627

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.180
C2 0.000 0.000 0.278
N3 0.000 0.000 1.440
H4 0.000 1.024 -1.556
H5 0.887 -0.512 -1.556
H6 -0.887 -0.512 -1.556

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45822.61961.09061.09061.0906
C21.45821.16142.10072.10072.1007
N32.61961.16143.16583.16583.1658
H41.09062.10073.16581.77311.7731
H51.09062.10073.16581.77311.7731
H61.09062.10073.16581.77311.7731

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 110.177
C2 C1 H5 110.177 C2 C1 H6 110.177
H4 C1 H5 108.756 H4 C1 H6 108.756
H5 C1 H6 108.756
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.510      
2 C 0.197      
3 N -0.240      
4 H 0.185      
5 H 0.185      
6 H 0.185      


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 -3.801 3.801
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.261 0.000 0.000
y 0.000 -17.261 0.000
z 0.000 0.000 -20.423
Traceless
 xyz
x 1.581 0.000 0.000
y 0.000 1.581 0.000
z 0.000 0.000 -3.162
Polar
3z2-r2-6.323
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 2.825 0.000 0.000
y 0.000 2.825 0.000
z 0.000 0.000 5.092


<r2> (average value of r2) Å2
<r2> 45.173
(<r2>)1/2 6.721