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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-132.375876
Energy at 298.15K-132.378396
HF Energy-131.921985
Nuclear repulsion energy57.760297
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 MP4/6-31G*
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 3081 2942        
2 A1 2219 2119        
3 A1 1454 1388        
4 A1 929 887        
5 E 3169 3026        
5 E 3169 3025        
6 E 1521 1452        
6 E 1521 1452        
7 E 1080 1031        
7 E 1080 1031        
8 E 347 331        
8 E 347 331        

Unscaled Zero Point Vibrational Energy (zpe) 9957.2 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 9507.2 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 MP4/6-31G*
ABC
5.26169 0.29992 0.29992

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.193
C2 0.000 0.000 0.277
N3 0.000 0.000 1.457
H4 0.000 1.029 -1.568
H5 0.891 -0.515 -1.568
H6 -0.891 -0.515 -1.568

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46952.64941.09561.09561.0956
C21.46951.17982.11252.11252.1125
N32.64941.17983.19503.19503.1950
H41.09562.11253.19501.78301.7830
H51.09562.11253.19501.78301.7830
H61.09562.11253.19501.78301.7830

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 110.026
C2 C1 H5 110.026 C2 C1 H6 110.026
H4 C1 H5 108.910 H4 C1 H6 108.910
H5 C1 H6 108.910
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability