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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD(T)/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)/cc-pVTZ
 hartrees
Energy at 0K-132.528536
Energy at 298.15K-132.531093
HF Energy-131.971997
Nuclear repulsion energy58.236533
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)/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 3065 2907        
2 A1 2293 2176        
3 A1 1414 1341        
4 A1 921 873        
5 E 3148 2987        
5 E 3148 2986        
6 E 1487 1411        
6 E 1487 1411        
7 E 1062 1007        
7 E 1061 1007        
8 E 361 342        
8 E 360 342        

Unscaled Zero Point Vibrational Energy (zpe) 9903.4 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 9394.4 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(T)/cc-pVTZ
ABC
5.30980 0.30451 0.30451

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/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 1.025 -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
C11.46632.62891.08941.08941.0894
C21.46631.16262.10272.10272.1027
N32.62891.16263.16903.16903.1690
H41.08942.10273.16901.77491.7749
H51.08942.10273.16901.77491.7749
H61.08942.10273.16901.77491.7749

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 109.842
C2 C1 H5 109.842 C2 C1 H6 109.842
H4 C1 H5 109.098 H4 C1 H6 109.098
H5 C1 H6 109.098
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability