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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CCSD(T)/cc-pVQZ

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(T)/cc-pVQZ
 hartrees
Energy at 0K-132.565780
Energy at 298.15K-132.568344
HF Energy-131.981555
Nuclear repulsion energy58.382580
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(T)/cc-pVQZ
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 3068 2975        
2 A1 2307 2237        
3 A1 1415 1372        
4 A1 925 897        
5 E 3154 3059        
5 E 3154 3058        
6 E 1489 1444        
6 E 1489 1444        
7 E 1064 1031        
7 E 1062 1030        
8 E 365 354        
8 E 364 353        

Unscaled Zero Point Vibrational Energy (zpe) 9927.7 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 9626.9 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(T)/cc-pVQZ
ABC
5.32134 0.30612 0.30612

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

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 0.280
N3 0.000 0.000 1.439
H4 0.000 1.024 -1.552
H5 0.886 -0.512 -1.552
H6 -0.886 -0.512 -1.552

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46322.62161.08831.08831.0883
C21.46321.15852.09922.09922.0992
N32.62161.15853.16143.16143.1614
H41.08832.09923.16141.77291.7729
H51.08832.09923.16141.77291.7729
H61.08832.09923.16141.77291.7729

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 109.849
C2 C1 H5 109.849 C2 C1 H6 109.849
H4 C1 H5 109.091 H4 C1 H6 109.091
H5 C1 H6 109.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability