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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD(T)/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(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-132.537563
Energy at 298.15K-132.540118
HF Energy-131.973473
Nuclear repulsion energy58.232833
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(T)/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 3060 2958        
2 A1 2287 2212        
3 A1 1416 1369        
4 A1 921 890        
5 E 3144 3039        
5 E 3143 3039        
6 E 1491 1442        
6 E 1491 1442        
7 E 1063 1028        
7 E 1063 1028        
8 E 359 347        
8 E 359 347        

Unscaled Zero Point Vibrational Energy (zpe) 9898.4 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 9569.7 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(T)/aug-cc-pVTZ
ABC
5.30036 0.30457 0.30457

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.186
C2 0.000 0.000 0.280
N3 0.000 0.000 1.443
H4 0.000 1.026 -1.555
H5 0.888 -0.513 -1.555
H6 -0.888 -0.513 -1.555

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46612.62871.09011.09011.0901
C21.46611.16272.10252.10252.1025
N32.62871.16273.16863.16863.1686
H41.09012.10253.16861.77651.7765
H51.09012.10253.16861.77651.7765
H61.09012.10253.16861.77651.7765

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 109.804
C2 C1 H5 109.804 C2 C1 H6 109.804
H4 C1 H5 109.137 H4 C1 H6 109.137
H5 C1 H6 109.137
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability