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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-132.499239
Energy at 298.15K-132.501785
HF Energy-131.972439
Nuclear repulsion energy58.250688
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/daug-cc-pVTZ
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 3095 3095 2.16 185.90 0.00 0.00
2 A1 2209 2209 0.14 52.22 0.14 0.25
3 A1 1419 1419 1.15 3.56 0.43 0.60
4 A1 934 934 0.98 6.42 0.06 0.11
5 E 3188 3188 0.13 50.58 0.75 0.86
5 E 3188 3188 0.13 50.58 0.75 0.86
6 E 1500 1500 10.29 4.80 0.75 0.86
6 E 1500 1500 10.29 4.80 0.75 0.86
7 E 1068 1068 1.32 0.05 0.75 0.86
7 E 1068 1068 1.32 0.05 0.75 0.86
8 E 357 357 0.52 1.06 0.75 0.86
8 E 357 357 0.52 1.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9941.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9941.1 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/daug-cc-pVTZ
ABC
5.33432 0.30514 0.30514

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/daug-cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.183
C2 0.000 0.000 0.275
N3 0.000 0.000 1.444
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
C11.45742.62691.08731.08731.0873
C21.45741.16952.09422.09422.0942
N32.62691.16953.16673.16673.1667
H41.08732.09423.16671.77081.7708
H51.08732.09423.16671.77081.7708
H61.08732.09423.16671.77081.7708

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 109.908
C2 C1 H5 109.908 C2 C1 H6 109.908
H4 C1 H5 109.031 H4 C1 H6 109.031
H5 C1 H6 109.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability