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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-132.333463
Energy at 298.15K-132.336094
HF Energy-131.937327
Nuclear repulsion energy58.181642
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/cc-pVDZ
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 3154 2907 4.26      
2 A1 2445 2254 4.13      
3 A1 1448 1335 0.37      
4 A1 959 884 3.47      
5 E 3250 2996 1.20      
5 E 3250 2996 1.20      
6 E 1509 1391 10.11      
6 E 1509 1391 10.11      
7 E 1088 1003 1.54      
7 E 1088 1003 1.54      
8 E 389 358 0.47      
8 E 389 358 0.47      

Unscaled Zero Point Vibrational Energy (zpe) 10238.4 cm-1
Scaled (by 0.9218) Zero Point Vibrational Energy (zpe) 9437.8 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/cc-pVDZ
ABC
5.24526 0.30413 0.30413

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pVDZ

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 0.284
N3 0.000 0.000 1.442
H4 0.000 1.031 -1.559
H5 0.893 -0.516 -1.559
H6 -0.893 -0.516 -1.559

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.47052.62921.09611.09611.0961
C21.47051.15872.11152.11152.1115
N32.62921.15873.17353.17353.1735
H41.09612.11153.17351.78581.7858
H51.09612.11153.17351.78581.7858
H61.09612.11153.17351.78581.7858

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 109.849
C2 C1 H5 109.849 C2 C1 H6 109.849
H4 C1 H5 109.091 H4 C1 H6 109.091
H5 C1 H6 109.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability