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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP3=FULL/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 MP3=FULL/3-21G*
 hartrees
Energy at 0K-131.490264
Energy at 298.15K-131.492976
HF Energy-131.189925
Nuclear repulsion energy58.087239
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 MP3=FULL/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 3091 3091 2.55      
2 A1 2417 2417 0.33      
3 A1 1511 1511 9.49      
4 A1 918 918 3.91      
5 E 3157 3157 2.66      
5 E 3157 3157 2.66      
6 E 1577 1577 12.27      
6 E 1577 1577 12.27      
7 E 1144 1144 2.32      
7 E 1144 1144 2.32      
8 E 430 430 0.01      
8 E 430 430 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 10275.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10275.7 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 MP3=FULL/3-21G*
ABC
5.27250 0.30288 0.30288

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.188
C2 0.000 0.000 0.284
N3 0.000 0.000 1.446
H4 0.000 1.028 -1.565
H5 0.891 -0.514 -1.565
H6 -0.891 -0.514 -1.565

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47182.63421.09511.09511.0951
C21.47181.16232.11532.11532.1153
N32.63421.16233.18163.18163.1816
H41.09512.11533.18161.78111.7811
H51.09512.11533.18161.78111.7811
H61.09512.11533.18161.78111.7811

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 110.116
C2 C1 H5 110.116 C2 C1 H6 110.116
H4 C1 H5 108.819 H4 C1 H6 108.819
H5 C1 H6 108.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability