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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CISD/6-311G*
 hartrees
Energy at 0K-132.354801
Energy at 298.15K-132.357450
HF Energy-131.955082
Nuclear repulsion energy58.588118
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 CISD/6-311G*
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 3144 2909 3.90      
2 A1 2448 2265 4.07      
3 A1 1483 1372 3.35      
4 A1 955 883 4.25      
5 E 3228 2987 2.50      
5 E 3228 2987 2.50      
6 E 1543 1428 12.43      
6 E 1543 1428 12.43      
7 E 1113 1029 1.99      
7 E 1113 1029 1.99      
8 E 396 366 0.49      
8 E 396 366 0.49      

Unscaled Zero Point Vibrational Energy (zpe) 10294.0 cm-1
Scaled (by 0.9253) Zero Point Vibrational Energy (zpe) 9525.1 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 CISD/6-311G*
ABC
5.33612 0.30798 0.30798

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311G*

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 0.284
N3 0.000 0.000 1.433
H4 0.000 1.022 -1.551
H5 0.885 -0.511 -1.551
H6 -0.885 -0.511 -1.551

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46372.61231.08741.08741.0874
C21.46371.14862.10022.10022.1002
N32.61231.14863.15363.15363.1536
H41.08742.10023.15361.77051.7705
H51.08742.10023.15361.77051.7705
H61.08742.10023.15361.77051.7705

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 109.948
C2 C1 H5 109.948 C2 C1 H6 109.948
H4 C1 H5 108.990 H4 C1 H6 108.990
H5 C1 H6 108.990
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability