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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2=FULL/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=FULL/cc-pVTZ
 hartrees
Energy at 0K-132.533143
Energy at 298.15K-132.535735
HF Energy-131.971553
Nuclear repulsion energy58.483366
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/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3116 2958 2.15      
2 A1 2241 2128 0.07      
3 A1 1426 1354 1.95      
4 A1 945 898 0.89      
5 E 3197 3035 0.18      
5 E 3197 3035 0.18      
6 E 1506 1430 10.22      
6 E 1506 1430 10.22      
7 E 1069 1015 1.71      
7 E 1069 1015 1.71      
8 E 373 354 0.35      
8 E 373 354 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 10008.9 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 9502.5 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/cc-pVTZ
ABC
5.37517 0.30768 0.30768

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.177
C2 0.000 0.000 0.275
N3 0.000 0.000 1.435
H4 0.000 1.019 -1.543
H5 0.883 -0.510 -1.543
H6 -0.883 -0.510 -1.543

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45192.61221.08301.08301.0830
C21.45191.16032.08432.08432.0843
N32.61221.16033.14813.14813.1481
H41.08302.08433.14811.76531.7653
H51.08302.08433.14811.76531.7653
H61.08302.08433.14811.76531.7653

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 109.768
C2 C1 H5 109.768 C2 C1 H6 109.768
H4 C1 H5 109.173 H4 C1 H6 109.173
H5 C1 H6 109.173
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability