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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CISD/3-21G
 hartrees
Energy at 0K-131.470197
Energy at 298.15K-131.472937
HF Energy-131.190093
Nuclear repulsion energy58.141282
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 CISD/3-21G
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 3112 2929 2.42      
2 A1 2400 2259 0.25      
3 A1 1525 1436 9.39      
4 A1 920 866 4.46      
5 E 3177 2991 2.60      
5 E 3177 2991 2.60      
6 E 1588 1495 12.46      
6 E 1588 1495 12.46      
7 E 1158 1090 2.51      
7 E 1158 1090 2.51      
8 E 441 415 0.00      
8 E 441 415 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 10341.5 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 9734.5 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 CISD/3-21G
ABC
5.29357 0.30338 0.30338

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.187
C2 0.000 0.000 0.283
N3 0.000 0.000 1.445
H4 0.000 1.026 -1.563
H5 0.889 -0.513 -1.563
H6 -0.889 -0.513 -1.563

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47022.63211.09311.09311.0931
C21.47021.16192.11262.11262.1126
N32.63211.16193.17873.17873.1787
H41.09312.11263.17871.77761.7776
H51.09312.11263.17871.77761.7776
H61.09312.11263.17871.77761.7776

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 110.138
C2 C1 H5 110.138 C2 C1 H6 110.138
H4 C1 H5 108.796 H4 C1 H6 108.796
H5 C1 H6 108.796
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability