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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-132.338244
Energy at 298.15K-132.340790
HF Energy-131.922203
Nuclear repulsion energy57.897287
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 MP2/6-31G*
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 3122 2944 2.24      
2 A1 2231 2104 0.16      
3 A1 1471 1388 3.32      
4 A1 944 890 1.75      
5 E 3216 3033 0.80      
5 E 3216 3033 0.80      
6 E 1539 1451 10.88      
6 E 1539 1451 10.88      
7 E 1094 1032 2.51      
7 E 1094 1032 2.51      
8 E 355 334 0.52      
8 E 355 334 0.52      

Unscaled Zero Point Vibrational Energy (zpe) 10087.3 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 9512.3 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 MP2/6-31G*
ABC
5.29884 0.30146 0.30146

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.188
C2 0.000 0.000 0.276
N3 0.000 0.000 1.450
H4 0.000 1.026 -1.560
H5 0.889 -0.513 -1.560
H6 -0.889 -0.513 -1.560

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46422.63781.09151.09151.0915
C21.46421.17362.10352.10352.1035
N32.63781.17363.17993.17993.1799
H41.09152.10353.17991.77731.7773
H51.09152.10353.17991.77731.7773
H61.09152.10353.17991.77731.7773

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 109.929
C2 C1 H5 109.929 C2 C1 H6 109.929
H4 C1 H5 109.009 H4 C1 H6 109.009
H5 C1 H6 109.009
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability