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: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-132.525354
Energy at 298.15K-132.520807
HF Energy-131.927448
Nuclear repulsion energy58.850382
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3227 3227 4.78      
2 A1 2626 2626 15.49      
3 A1 1546 1546 0.51      
4 A1 970 970 7.96      
5 E 3313 3313 3.72      
5 E 3313 3313 3.72      
6 E 1609 1609 9.04      
6 E 1609 1609 9.04      
7 E 1164 1164 1.74      
7 E 1164 1164 1.74      
8 E 424 424 1.85      
8 E 424 424 1.85      

Unscaled Zero Point Vibrational Energy (zpe) 10693.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10693.7 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 CBS-Q
ABC
5.27220 0.30045 0.30045

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

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 0.290
N3 0.000 0.000 1.425
H4 0.000 1.020 -1.547
H5 0.883 -0.510 -1.547
H6 -0.883 -0.510 -1.547

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46952.60371.08411.08411.0841
C21.46951.13422.10142.10142.1014
N32.60371.13423.14173.14173.1417
H41.08412.10143.14171.76631.7663
H51.08412.10143.14171.76631.7663
H61.08412.10143.14171.76631.7663

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 109.836
C2 C1 H5 109.836 C2 C1 H6 109.836
H4 C1 H5 109.104 H4 C1 H6 109.104
H5 C1 H6 109.104
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability