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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CCSD=FULL/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=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-132.472760
Energy at 298.15K-132.475444
HF Energy-131.940314
Nuclear repulsion energy58.528749
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=FULL/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 3122 2939 2.07      
2 A1 2394 2254 2.25      
3 A1 1452 1367 1.51      
4 A1 945 890 2.15      
5 E 3209 3021 0.54      
5 E 3209 3021 0.54      
6 E 1523 1435 8.89      
6 E 1523 1435 8.89      
7 E 1095 1031 2.33      
7 E 1095 1031 2.33      
8 E 418 394 1.04      
8 E 418 394 1.04      

Unscaled Zero Point Vibrational Energy (zpe) 10201.8 cm-1
Scaled (by 0.9416) Zero Point Vibrational Energy (zpe) 9606.0 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=FULL/6-31G(2df,p)
ABC
5.33125 0.30781 0.30781

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.179
C2 0.000 0.000 0.280
N3 0.000 0.000 1.435
H4 0.000 1.023 -1.551
H5 0.886 -0.511 -1.551
H6 -0.886 -0.511 -1.551

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45902.61321.08841.08841.0884
C21.45901.15422.09762.09762.0976
N32.61321.15423.15593.15593.1559
H41.08842.09763.15591.77131.7713
H51.08842.09763.15591.77131.7713
H61.08842.09763.15591.77131.7713

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 110.013
C2 C1 H5 110.013 C2 C1 H6 110.013
H4 C1 H5 108.924 H4 C1 H6 108.924
H5 C1 H6 108.924
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability