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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/6-31G*

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/6-31G*
 hartrees
Energy at 0K-132.358218
Energy at 298.15K-132.360774
HF Energy-131.924428
Nuclear repulsion energy58.019117
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/6-31G*
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 3091 2944 3.68      
2 A1 2356 2244 1.28      
3 A1 1464 1394 2.77      
4 A1 939 895 2.98      
5 E 3176 3024 2.47      
5 E 3176 3024 2.47      
6 E 1526 1453 10.26      
6 E 1526 1453 10.26      
7 E 1089 1037 1.87      
7 E 1089 1037 1.87      
8 E 361 344 0.69      
8 E 361 344 0.69      

Unscaled Zero Point Vibrational Energy (zpe) 10076.3 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 9595.7 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/6-31G*
ABC
5.26798 0.30238 0.30238

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.189
C2 0.000 0.000 0.282
N3 0.000 0.000 1.447
H4 0.000 1.029 -1.562
H5 0.891 -0.514 -1.562
H6 -0.891 -0.514 -1.562

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47082.63621.09441.09441.0944
C21.47081.16542.11152.11152.1115
N32.63621.16543.18033.18033.1803
H41.09442.11153.18031.78211.7821
H51.09442.11153.18031.78211.7821
H61.09442.11153.18031.78211.7821

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 109.927
C2 C1 H5 109.927 C2 C1 H6 109.927
H4 C1 H5 109.011 H4 C1 H6 109.011
H5 C1 H6 109.011
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability