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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/TZVP

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/TZVP
 hartrees
Energy at 0K-132.436196
Energy at 298.15K-132.438761
HF Energy-131.969349
Nuclear repulsion energy58.377594
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/TZVP
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 3094 2955 5.56      
2 A1 2357 2251 1.47      
3 A1 1446 1382 0.74      
4 A1 931 889 2.64      
5 E 3178 3036 2.89      
5 E 3178 3036 2.89      
6 E 1505 1438 9.90      
6 E 1505 1438 9.90      
7 E 1082 1034 0.35      
7 E 1082 1034 0.35      
8 E 360 344 0.46      
8 E 360 344 0.46      

Unscaled Zero Point Vibrational Energy (zpe) 10037.9 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 9589.2 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/TZVP
ABC
5.30990 0.30598 0.30598

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/TZVP

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 0.282
N3 0.000 0.000 1.438
H4 0.000 1.025 -1.553
H5 0.887 -0.512 -1.553
H6 -0.887 -0.512 -1.553

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46522.62201.08931.08931.0893
C21.46521.15672.10152.10152.1015
N32.62201.15673.16223.16223.1622
H41.08932.10153.16221.77491.7749
H51.08932.10153.16221.77491.7749
H61.08932.10153.16221.77491.7749

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 109.832
C2 C1 H5 109.832 C2 C1 H6 109.832
H4 C1 H5 109.108 H4 C1 H6 109.108
H5 C1 H6 109.108
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability