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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-130.483647
Energy at 298.15K-130.486078
HF Energy-130.257254
Nuclear repulsion energy56.203258
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 MP2/STO-3G
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 3376 2944 0.00      
2 A1 2133 1860 32.38      
3 A1 1591 1387 0.26      
4 A1 938 818 0.54      
5 E 3551 3096 0.54      
5 E 3551 3096 0.54      
6 E 1693 1476 4.44      
6 E 1693 1476 4.44      
7 E 1178 1027 1.10      
7 E 1178 1027 1.10      
8 E 349 305 0.43      
8 E 349 305 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 10790.8 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 9408.5 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 MP2/STO-3G
ABC
5.17321 0.28253 0.28253

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.230
C2 0.000 0.000 0.279
N3 0.000 0.000 1.504
H4 0.000 1.038 -1.609
H5 0.899 -0.519 -1.609
H6 -0.899 -0.519 -1.609

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.50892.73401.10531.10531.1053
C21.50891.22522.15472.15472.1547
N32.73401.22523.28183.28183.2818
H41.10532.15473.28181.79811.7981
H51.10532.15473.28181.79811.7981
H61.10532.15473.28181.79811.7981

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 110.068
C2 C1 H5 110.068 C2 C1 H6 110.068
H4 C1 H5 108.868 H4 C1 H6 108.868
H5 C1 H6 108.868
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability