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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-131.512541
Energy at 298.15K-131.515213
HF Energy-131.185983
Nuclear repulsion energy57.507936
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 MP4/3-21G
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 3044 2952        
2 A1 2173 2107        
3 A1 1491 1446        
4 A1 881 854        
5 E 3112 3018        
5 E 3112 3018        
6 E 1561 1514        
6 E 1561 1514        
7 E 1128 1094        
7 E 1128 1094        
8 E 414 402        
8 E 414 402        

Unscaled Zero Point Vibrational Energy (zpe) 10009.7 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 9707.4 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 MP4/3-21G
ABC
5.24050 0.29694 0.29694

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.199
C2 0.000 0.000 0.280
N3 0.000 0.000 1.464
H4 0.000 1.031 -1.577
H5 0.893 -0.516 -1.577
H6 -0.893 -0.516 -1.577

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47842.66231.09881.09881.0988
C21.47841.18392.12432.12432.1243
N32.66231.18393.21113.21113.2111
H41.09882.12433.21111.78661.7866
H51.09882.12433.21111.78661.7866
H61.09882.12433.21111.78661.7866

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 110.156
C2 C1 H5 110.156 C2 C1 H6 110.156
H4 C1 H5 108.778 H4 C1 H6 108.778
H5 C1 H6 108.778
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability