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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/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 QCISD/6-311G**
 hartrees
Energy at 0K-132.426630
Energy at 298.15K-132.429223
HF Energy-131.958014
Nuclear repulsion energy58.180105
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/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 3083 2941 5.07      
2 A1 2343 2235 1.01      
3 A1 1436 1371 0.95      
4 A1 931 888 2.67      
5 E 3166 3021 2.84      
5 E 3166 3021 2.84      
6 E 1503 1434 9.67      
6 E 1503 1434 9.67      
7 E 1077 1028 0.89      
7 E 1077 1028 0.89      
8 E 374 357 0.40      
8 E 374 357 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 10017.0 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 9557.2 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/6-311G**
ABC
5.27152 0.30393 0.30393

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.187
C2 0.000 0.000 0.283
N3 0.000 0.000 1.443
H4 0.000 1.028 -1.558
H5 0.891 -0.514 -1.558
H6 -0.891 -0.514 -1.558

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47022.63081.09321.09321.0932
C21.47021.16052.10882.10882.1088
N32.63081.16053.17283.17283.1728
H41.09322.10883.17281.78131.7813
H51.09322.10883.17281.78131.7813
H61.09322.10883.17281.78131.7813

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 109.823
C2 C1 H5 109.823 C2 C1 H6 109.823
H4 C1 H5 109.118 H4 C1 H6 109.118
H5 C1 H6 109.118
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability