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/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/daug-cc-pVTZ
 hartrees
Energy at 0K-132.513267
Energy at 298.15K-132.515843
HF Energy-131.974894
Nuclear repulsion energy58.430878
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/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 3080 3080 3.08      
2 A1 2347 2347 3.32      
3 A1 1433 1433 0.62      
4 A1 931 931 2.01      
5 E 3162 3162 1.03      
5 E 3162 3162 1.04      
6 E 1505 1505 9.50      
6 E 1505 1505 9.49      
7 E 1078 1078 1.02      
7 E 1078 1078 1.02      
8 E 369 369 0.88      
8 E 369 369 0.88      

Unscaled Zero Point Vibrational Energy (zpe) 10010.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10010.5 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/daug-cc-pVTZ
ABC
5.31736 0.30652 0.30652

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.183
C2 0.000 0.000 0.282
N3 0.000 0.000 1.437
H4 0.000 1.024 -1.551
H5 0.887 -0.512 -1.551
H6 -0.887 -0.512 -1.551

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46432.61971.08841.08841.0884
C21.46431.15542.09972.09972.0997
N32.61971.15543.15903.15903.1590
H41.08842.09973.15901.77361.7736
H51.08842.09973.15901.77361.7736
H61.08842.09973.15901.77361.7736

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 109.803
C2 C1 H5 109.803 C2 C1 H6 109.803
H4 C1 H5 109.137 H4 C1 H6 109.137
H5 C1 H6 109.137
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability