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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-132.384510
Energy at 298.15K-132.387081
HF Energy-131.935195
Nuclear repulsion energy57.755687
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/cc-pVDZ
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 3088 2963 5.38      
2 A1 2336 2241 1.03      
3 A1 1415 1358 0.33      
4 A1 935 897 2.41      
5 E 3183 3054 1.80      
5 E 3183 3054 1.80      
6 E 1478 1418 9.31      
6 E 1478 1418 9.31      
7 E 1061 1018 1.19      
7 E 1061 1018 1.19      
8 E 367 353 0.32      
8 E 367 353 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 9975.8 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 9570.8 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/cc-pVDZ
ABC
5.19071 0.29984 0.29984

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.194
C2 0.000 0.000 0.283
N3 0.000 0.000 1.454
H4 0.000 1.036 -1.569
H5 0.898 -0.518 -1.569
H6 -0.898 -0.518 -1.569

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47722.64851.10211.10211.1021
C21.47721.17132.12232.12232.1223
N32.64851.17133.19603.19603.1960
H41.10212.12233.19601.79511.7951
H51.10212.12233.19601.79511.7951
H61.10212.12233.19601.79511.7951

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 109.883
C2 C1 H5 109.883 C2 C1 H6 109.883
H4 C1 H5 109.056 H4 C1 H6 109.056
H5 C1 H6 109.056
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability