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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: MP2=FULL/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=FULL/STO-3G
 hartrees
Energy at 0K-130.484690
Energy at 298.15K-130.487121
HF Energy-130.257284
Nuclear repulsion energy56.217043
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=FULL/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 3377 3002 0.00      
2 A1 2134 1897 32.30      
3 A1 1591 1414 0.25      
4 A1 940 835 0.52      
5 E 3552 3158 0.55      
5 E 3552 3158 0.55      
6 E 1693 1505 4.43      
6 E 1693 1505 4.43      
7 E 1178 1047 1.11      
7 E 1178 1047 1.11      
8 E 349 311 0.43      
8 E 349 311 0.43      

Unscaled Zero Point Vibrational Energy (zpe) 10793.4 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 9594.3 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=FULL/STO-3G
ABC
5.17276 0.28272 0.28272

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.229
C2 0.000 0.000 0.279
N3 0.000 0.000 1.504
H4 0.000 1.038 -1.608
H5 0.899 -0.519 -1.608
H6 -0.899 -0.519 -1.608

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.50802.73321.10511.10511.1051
C21.50801.22522.15362.15362.1536
N32.73321.22523.28063.28063.2806
H41.10512.15363.28061.79821.7982
H51.10512.15363.28061.79821.7982
H61.10512.15363.28061.79821.7982

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 110.043
C2 C1 H5 110.043 C2 C1 H6 110.043
H4 C1 H5 108.894 H4 C1 H6 108.894
H5 C1 H6 108.894
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability