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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2=FULL/3-21G*

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=FULL/3-21G*
 hartrees
Energy at 0K-131.493465
Energy at 298.15K-131.496151
HF Energy-131.185840
Nuclear repulsion energy57.601600
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=FULL/3-21G*
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 3100 2939 2.36 99.36 0.00 0.00
2 A1 2160 2048 3.48 15.46 0.30 0.46
3 A1 1513 1434 8.17 13.50 0.65 0.79
4 A1 897 850 1.89 4.07 0.20 0.34
5 E 3172 3007 2.24 56.47 0.75 0.86
5 E 3172 3007 2.24 56.47 0.75 0.86
6 E 1585 1502 11.81 21.67 0.75 0.86
6 E 1585 1502 11.81 21.67 0.75 0.86
7 E 1147 1087 2.59 0.15 0.75 0.86
7 E 1147 1087 2.59 0.15 0.75 0.86
8 E 418 396 0.03 3.25 0.75 0.86
8 E 418 396 0.03 3.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 10156.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9628.5 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=FULL/3-21G*
ABC
5.28737 0.29796 0.29796

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.196
C2 0.000 0.000 0.276
N3 0.000 0.000 1.463
H4 0.000 1.027 -1.574
H5 0.889 -0.513 -1.574
H6 -0.889 -0.513 -1.574

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47192.65831.09441.09441.0944
C21.47191.18632.11622.11622.1162
N32.65831.18633.20563.20563.2056
H41.09442.11623.20561.77861.7786
H51.09442.11623.20561.77861.7786
H61.09442.11623.20561.77861.7786

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 110.229
C2 C1 H5 110.229 C2 C1 H6 110.229
H4 C1 H5 108.703 H4 C1 H6 108.703
H5 C1 H6 108.703
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability