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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-132.485654
Energy at 298.15K-132.488216
HF Energy-131.969459
Nuclear repulsion energy58.278015
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 MP2/6-311+G(3df,2p)
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 3098 2923 2.07 170.65 0.00 0.00
2 A1 2216 2090 0.16 48.71 0.17 0.29
3 A1 1422 1341 1.29 3.42 0.44 0.61
4 A1 933 880 1.00 5.98 0.06 0.12
5 E 3193 3012 0.15 50.99 0.75 0.86
5 E 3193 3012 0.15 50.99 0.75 0.86
6 E 1498 1413 10.72 4.97 0.75 0.86
6 E 1498 1413 10.72 4.97 0.75 0.86
7 E 1065 1005 1.43 0.06 0.75 0.86
7 E 1065 1005 1.43 0.06 0.75 0.86
8 E 362 341 0.49 1.43 0.75 0.86
8 E 362 341 0.49 1.43 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9951.3 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 9388.0 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 MP2/6-311+G(3df,2p)
ABC
5.34062 0.30538 0.30538

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.182
C2 0.000 0.000 0.275
N3 0.000 0.000 1.443
H4 0.000 1.022 -1.553
H5 0.885 -0.511 -1.553
H6 -0.885 -0.511 -1.553

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45722.62551.08711.08711.0871
C21.45721.16832.09462.09462.0946
N32.62551.16833.16623.16623.1662
H41.08712.09463.16621.76971.7697
H51.08712.09463.16621.76971.7697
H61.08712.09463.16621.76971.7697

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 109.967
C2 C1 H5 109.967 C2 C1 H6 109.967
H4 C1 H5 108.971 H4 C1 H6 108.971
H5 C1 H6 108.971
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability