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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-132.492039
Energy at 298.15K-132.494607
HF Energy-131.975653
Nuclear repulsion energy58.278412
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/Def2TZVPP
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 3103 2953 2.27 166.60 0.00 0.00
2 A1 2221 2113 0.01 40.47 0.22 0.36
3 A1 1421 1352 1.42 3.54 0.54 0.70
4 A1 937 892 1.01 5.11 0.09 0.17
5 E 3196 3041 0.19 53.35 0.75 0.86
5 E 3196 3041 0.19 53.35 0.75 0.86
6 E 1496 1423 10.32 6.76 0.75 0.86
6 E 1496 1423 10.32 6.76 0.75 0.86
7 E 1066 1015 1.37 0.00 0.75 0.86
7 E 1066 1015 1.37 0.00 0.75 0.86
8 E 365 348 0.40 2.25 0.75 0.86
8 E 365 348 0.40 2.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9964.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 9481.5 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/Def2TZVPP
ABC
5.34318 0.30536 0.30536

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

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
C11.45732.62581.08671.08671.0867
C21.45731.16862.09392.09392.0939
N32.62581.16863.16573.16573.1657
H41.08672.09393.16571.76931.7693
H51.08672.09393.16571.76931.7693
H61.08672.09393.16571.76931.7693

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 109.939
C2 C1 H5 109.939 C2 C1 H6 109.939
H4 C1 H5 109.000 H4 C1 H6 109.000
H5 C1 H6 109.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability