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: CCSD(T)/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCSD(T)/daug-cc-pVTZ
 hartrees
Energy at 0K-132.537930
Energy at 298.15K 
HF Energy-131.973785
Nuclear repulsion energy58.246107
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 CCSD(T)/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/daug-cc-pVTZ
ABC
5.29960 0.30469 0.30469

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/daug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.186
C2 0.000 0.000 0.280
N3 0.000 0.000 1.442
H4 0.000 1.026 -1.555
H5 0.888 -0.513 -1.555
H6 -0.888 -0.513 -1.555

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46622.62821.09001.09001.0900
C21.46621.16202.10232.10232.1023
N32.62821.16203.16773.16773.1677
H41.09002.10233.16771.77661.7766
H51.09002.10233.16771.77661.7766
H61.09002.10233.16771.77661.7766

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 109.779
C2 C1 H5 109.779 C2 C1 H6 109.779
H4 C1 H5 109.162 H4 C1 H6 109.162
H5 C1 H6 109.162
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability