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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD(T)=FULL/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-132.407608
Energy at 298.15K-132.410155
HF Energy-131.934155
Nuclear repulsion energy57.638186
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/cc-pVDZ
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 3077 2951        
2 A1 2287 2193        
3 A1 1404 1347        
4 A1 927 889        
5 E 3174 3044        
5 E 3174 3044        
6 E 1471 1411        
6 E 1471 1411        
7 E 1052 1009        
7 E 1052 1009        
8 E 359 344        
8 E 359 344        

Unscaled Zero Point Vibrational Energy (zpe) 9903.8 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 9497.7 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/cc-pVDZ
ABC
5.18617 0.29873 0.29873

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.196
C2 0.000 0.000 0.281
N3 0.000 0.000 1.458
H4 0.000 1.037 -1.571
H5 0.898 -0.518 -1.571
H6 -0.898 -0.518 -1.571

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47732.65401.10251.10251.1025
C21.47731.17682.12252.12252.1225
N32.65401.17683.20143.20143.2014
H41.10252.12253.20141.79591.7959
H51.10252.12253.20141.79591.7959
H61.10252.12253.20141.79591.7959

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 109.874
C2 C1 H5 109.874 C2 C1 H6 109.874
H4 C1 H5 109.066 H4 C1 H6 109.066
H5 C1 H6 109.066
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability