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: QCISD(T)=FULL/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 QCISD(T)=FULL/daug-cc-pVTZ
 hartrees
Energy at 0K-132.594440
Energy at 298.15K-132.596994
HF Energy-131.974587
Nuclear repulsion energy58.474463
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 QCISD(T)=FULL/daug-cc-pVTZ
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 3081 3081        
2 A1 2316 2316        
3 A1 1426 1426        
4 A1 932 932        
5 E 3144 3144        
5 E 3144 3144        
6 E 1505 1505        
6 E 1505 1505        
7 E 1076 1076        
7 E 1076 1076        
8 E 359 359        
8 E 359 359        

Unscaled Zero Point Vibrational Energy (zpe) 9962.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9962.0 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 QCISD(T)=FULL/daug-cc-pVTZ
ABC
5.33287 0.30728 0.30728

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

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 0.279
N3 0.000 0.000 1.437
H4 0.000 1.023 -1.550
H5 0.886 -0.511 -1.550
H6 -0.886 -0.511 -1.550

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45892.61651.08731.08731.0873
C21.45891.15762.09522.09522.0952
N32.61651.15763.15653.15653.1565
H41.08732.09523.15651.77101.7710
H51.08732.09523.15651.77101.7710
H61.08732.09523.15651.77101.7710

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 109.882
C2 C1 H5 109.882 C2 C1 H6 109.882
H4 C1 H5 109.057 H4 C1 H6 109.057
H5 C1 H6 109.057
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability