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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP4/aug-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 MP4/aug-cc-pVDZ
 hartrees
Energy at 0K-132.425316
Energy at 298.15K-132.427832
HF Energy-131.937820
Nuclear repulsion energy57.431892
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 MP4/6-31G*
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 3081 3010        
2 A1 2219 2168        
3 A1 1454 1420        
4 A1 929 907        
5 E 3169 3096        
5 E 3169 3095        
6 E 1521 1486        
6 E 1521 1486        
7 E 1080 1055        
7 E 1080 1055        
8 E 347 339        
8 E 347 339        

Unscaled Zero Point Vibrational Energy (zpe) 9957.2 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 9727.2 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 MP4/aug-cc-pVDZ
ABC
5.17902 0.29657 0.29657

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.201
C2 0.000 0.000 0.279
N3 0.000 0.000 1.464
H4 0.000 1.038 -1.574
H5 0.899 -0.519 -1.574
H6 -0.899 -0.519 -1.574

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47962.66501.10261.10261.1026
C21.47961.18542.12342.12342.1234
N32.66501.18543.21043.21043.2104
H41.10262.12343.21041.79711.7971
H51.10262.12343.21041.79711.7971
H61.10262.12343.21041.79711.7971

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 109.776
C2 C1 H5 109.776 C2 C1 H6 109.776
H4 C1 H5 109.165 H4 C1 H6 109.165
H5 C1 H6 109.164
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability