return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CID/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CID/6-311+G(3df,2p)
 hartrees
Energy at 0K-132.437697
Energy at 298.15K-132.440350
HF Energy-131.973369
Nuclear repulsion energy58.887035
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 CID/6-311+G(3df,2p)
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 3156 2916 2.22      
2 A1 2467 2280 7.89      
3 A1 1473 1361 0.74      
4 A1 956 883 3.00      
5 E 3242 2996 0.71      
5 E 3242 2996 0.71      
6 E 1538 1422 10.41      
6 E 1538 1422 10.41      
7 E 1105 1021 1.43      
7 E 1105 1021 1.43      
8 E 396 366 1.17      
8 E 396 366 1.17      

Unscaled Zero Point Vibrational Energy (zpe) 10307.3 cm-1
Scaled (by 0.924) Zero Point Vibrational Energy (zpe) 9523.9 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 CID/6-311+G(3df,2p)
ABC
5.37878 0.31104 0.31104

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/6-311+G(3df,2p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.175
C2 0.000 0.000 0.284
N3 0.000 0.000 1.425
H4 0.000 1.018 -1.542
H5 0.882 -0.509 -1.542
H6 -0.882 -0.509 -1.542

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.45842.59971.08221.08221.0822
C21.45841.14132.09012.09012.0901
N32.59971.14133.13653.13653.1365
H41.08222.09013.13651.76351.7635
H51.08222.09013.13651.76351.7635
H61.08222.09013.13651.76351.7635

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 109.819
C2 C1 H5 109.819 C2 C1 H6 109.819
H4 C1 H5 109.121 H4 C1 H6 109.121
H5 C1 H6 109.121
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability