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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CCSD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-132.447758
Energy at 298.15K-132.450369
HF Energy-131.939785
Nuclear repulsion energy58.346481
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 CCSD/6-31G(2df,p)
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 3112 2942 2.15      
2 A1 2377 2248 1.88      
3 A1 1442 1363 1.26      
4 A1 935 884 2.27      
5 E 3198 3024 0.63      
5 E 3198 3024 0.63      
6 E 1507 1425 8.86      
6 E 1507 1425 8.86      
7 E 1079 1020 1.98      
7 E 1079 1020 1.98      
8 E 385 364 1.03      
8 E 385 364 1.03      

Unscaled Zero Point Vibrational Energy (zpe) 10103.0 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 9552.4 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 CCSD/6-31G(2df,p)
ABC
5.31055 0.30572 0.30572

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.183
C2 0.000 0.000 0.282
N3 0.000 0.000 1.439
H4 0.000 1.025 -1.556
H5 0.887 -0.512 -1.556
H6 -0.887 -0.512 -1.556

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46452.62241.09031.09031.0903
C21.46451.15792.10372.10372.1037
N32.62241.15793.16563.16563.1656
H41.09032.10373.16561.77471.7747
H51.09032.10373.16561.77471.7747
H61.09032.10373.16561.77471.7747

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 109.990
C2 C1 H5 109.990 C2 C1 H6 109.990
H4 C1 H5 108.947 H4 C1 H6 108.947
H5 C1 H6 108.947
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability