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All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-132.177992
Energy at 298.15K-132.180438
HF Energy-131.860627
Nuclear repulsion energy57.419142
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 QCISD/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 3030 2920 6.34      
2 A1 2258 2176 0.45      
3 A1 1482 1428 5.57      
4 A1 910 876 4.01      
5 E 3107 2993 6.17      
5 E 3107 2993 6.17      
6 E 1531 1475 11.83      
6 E 1531 1475 11.83      
7 E 1103 1063 1.20      
7 E 1103 1063 1.20      
8 E 310 298 0.12      
8 E 310 298 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 9889.2 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 9529.2 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 QCISD/6-31G
ABC
5.23114 0.29588 0.29588

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.200
C2 0.000 0.000 0.282
N3 0.000 0.000 1.466
H4 0.000 1.032 -1.583
H5 0.894 -0.516 -1.583
H6 -0.894 -0.516 -1.583

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.48192.66621.10101.10101.1010
C21.48191.18432.13122.13122.1312
N32.66621.18433.21883.21883.2188
H41.10102.13123.21881.78821.7882
H51.10102.13123.21881.78821.7882
H61.10102.13123.21881.78821.7882

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 110.330
C2 C1 H5 110.330 C2 C1 H6 110.330
H4 C1 H5 108.599 H4 C1 H6 108.599
H5 C1 H6 108.599
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability