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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-131.863026
Energy at 298.15K-131.865796
HF Energy-131.863026
Nuclear repulsion energy58.380415
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 PBE1PBE/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 3079 2955 0.77 116.98 0.00 0.00
2 A1 2383 2287 3.69 36.57 0.31 0.47
3 A1 1477 1418 19.04 16.53 0.63 0.78
4 A1 949 911 1.65 3.02 0.19 0.31
5 E 3155 3028 0.36 63.60 0.75 0.86
5 E 3155 3028 0.36 63.60 0.75 0.86
6 E 1539 1478 16.73 21.28 0.75 0.86
6 E 1539 1478 16.73 21.28 0.75 0.86
7 E 1121 1076 6.62 0.01 0.75 0.86
7 E 1121 1076 6.62 0.01 0.75 0.86
8 E 465 446 0.23 3.88 0.75 0.86
8 E 465 446 0.23 3.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10223.7 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 9812.7 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 PBE1PBE/3-21G*
ABC
5.28390 0.30737 0.30737

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.175
C2 0.000 0.000 0.275
N3 0.000 0.000 1.438
H4 0.000 1.027 -1.556
H5 0.890 -0.514 -1.556
H6 -0.890 -0.514 -1.556

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45062.61351.09571.09571.0957
C21.45061.16292.10012.10012.1001
N32.61351.16293.16603.16603.1660
H41.09572.10013.16601.77921.7792
H51.09572.10013.16601.77921.7792
H61.09572.10013.16601.77921.7792

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 110.359
C2 C1 H5 110.359 C2 C1 H6 110.359
H4 C1 H5 108.569 H4 C1 H6 108.569
H5 C1 H6 108.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.690      
2 C 0.341      
3 N -0.495      
4 H 0.281      
5 H 0.281      
6 H 0.281      


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 -3.688 3.688
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.360 0.000 0.000
y 0.000 -17.360 0.000
z 0.000 0.000 -20.378
Traceless
 xyz
x 1.509 0.000 0.000
y 0.000 1.509 0.000
z 0.000 0.000 -3.017
Polar
3z2-r2-6.035
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 2.303 0.000 0.000
y 0.000 2.303 0.000
z 0.000 0.000 4.635


<r2> (average value of r2) Å2
<r2> 45.126
(<r2>)1/2 6.718