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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD(T)=FULL/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(T)=FULL/6-31G*
 hartrees
Energy at 0K-132.386642
Energy at 298.15K-132.389188
HF Energy-131.923585
Nuclear repulsion energy57.925828
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)=FULL/6-31G*
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 3076 3076        
2 A1 2314 2314        
3 A1 1455 1455        
4 A1 933 933        
5 E 3161 3161        
5 E 3161 3161        
6 E 1520 1520        
6 E 1519 1519        
7 E 1082 1082        
7 E 1081 1081        
8 E 358 358        
8 E 358 358        

Unscaled Zero Point Vibrational Energy (zpe) 10008.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10008.8 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)=FULL/6-31G*
ABC
5.26050 0.30159 0.30159

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.190
C2 0.000 0.000 0.279
N3 0.000 0.000 1.451
H4 0.000 1.030 -1.565
H5 0.892 -0.515 -1.565
H6 -0.892 -0.515 -1.565

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46932.64131.09551.09551.0955
C21.46931.17202.11172.11172.1117
N32.64131.17203.18673.18673.1867
H41.09552.11173.18671.78321.7832
H51.09552.11173.18671.78321.7832
H61.09552.11173.18671.78321.7832

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 109.988
C2 C1 H5 109.988 C2 C1 H6 109.988
H4 C1 H5 108.950 H4 C1 H6 108.950
H5 C1 H6 108.950
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability