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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CCSD(T)/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 CCSD(T)/6-311+G(3df,2p)
 hartrees
Energy at 0K-132.525013
Energy at 298.15K-132.527569
HF Energy-131.970727
Nuclear repulsion energy58.261513
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)/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 3063 3023        
2 A1 2296 2266        
3 A1 1419 1400        
4 A1 920 908        
5 E 3148 3107        
5 E 3148 3107        
6 E 1490 1471        
6 E 1490 1471        
7 E 1061 1048        
7 E 1061 1047        
8 E 361 356        
8 E 361 356        

Unscaled Zero Point Vibrational Energy (zpe) 9909.4 cm-1
Scaled (by 0.9869) Zero Point Vibrational Energy (zpe) 9779.6 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)/6-311+G(3df,2p)
ABC
5.30411 0.30481 0.30481

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.185
C2 0.000 0.000 0.281
N3 0.000 0.000 1.442
H4 0.000 1.025 -1.555
H5 0.888 -0.513 -1.555
H6 -0.888 -0.513 -1.555

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46632.62741.09001.09001.0900
C21.46631.16112.10312.10312.1031
N32.62741.16113.16793.16793.1679
H41.09002.10313.16791.77581.7758
H51.09002.10313.16791.77581.7758
H61.09002.10313.16791.77581.7758

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 109.843
C2 C1 H5 109.843 C2 C1 H6 109.843
H4 C1 H5 109.097 H4 C1 H6 109.097
H5 C1 H6 109.097
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability