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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/aug-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 QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-132.512319
Energy at 298.15K-132.514909
HF Energy-131.974687
Nuclear repulsion energy58.434491
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 QCISD/aug-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 3080 2964 3.07      
2 A1 2348 2260 3.39      
3 A1 1434 1380 0.62      
4 A1 932 897 2.00      
5 E 3162 3043 1.06      
5 E 3162 3043 1.06      
6 E 1504 1448 9.47      
6 E 1504 1448 9.47      
7 E 1077 1036 1.02      
7 E 1077 1036 1.02      
8 E 371 357 0.89      
8 E 371 357 0.89      

Unscaled Zero Point Vibrational Energy (zpe) 10011.9 cm-1
Scaled (by 0.9624) Zero Point Vibrational Energy (zpe) 9635.4 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 QCISD/aug-cc-pVTZ
ABC
5.31878 0.30658 0.30658

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

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 0.282
N3 0.000 0.000 1.437
H4 0.000 1.024 -1.551
H5 0.887 -0.512 -1.551
H6 -0.887 -0.512 -1.551

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46392.61941.08841.08841.0884
C21.46391.15552.09962.09962.0996
N32.61941.15553.15903.15903.1590
H41.08842.09963.15901.77341.7734
H51.08842.09963.15901.77341.7734
H61.08842.09963.15901.77341.7734

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 109.824
C2 C1 H5 109.824 C2 C1 H6 109.824
H4 C1 H5 109.116 H4 C1 H6 109.116
H5 C1 H6 109.116
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability