return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CN (Acetonitrile)

using model chemistry: CCSD=FULL/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at CCSD=FULL/Def2TZVPP
 hartrees
Energy at 0K-132.564487
Energy at 298.15K-132.567087
HF Energy-131.978543
Nuclear repulsion energy58.586308
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 CCSD=FULL/Def2TZVPP
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 3089 3089 2.96      
2 A1 2377 2377 2.42      
3 A1 1439 1439 0.93      
4 A1 938 938 2.07      
5 E 3171 3171 0.98      
5 E 3171 3171 0.98      
6 E 1503 1503 9.77      
6 E 1503 1503 9.77      
7 E 1079 1079 1.15      
7 E 1079 1079 1.15      
8 E 378 378 0.73      
8 E 378 378 0.73      

Unscaled Zero Point Vibrational Energy (zpe) 10052.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10052.2 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 CCSD=FULL/Def2TZVPP
ABC
5.34647 0.30804 0.30804

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.180
C2 0.000 0.000 0.282
N3 0.000 0.000 1.433
H4 0.000 1.021 -1.548
H5 0.884 -0.511 -1.548
H6 -0.884 -0.511 -1.548

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6
C11.46172.61311.08551.08551.0855
C21.46171.15142.09542.09542.0954
N32.61311.15143.15123.15123.1512
H41.08552.09543.15121.76881.7688
H51.08552.09543.15121.76881.7688
H61.08552.09543.15121.76881.7688

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 109.816
C2 C1 H5 109.816 C2 C1 H6 109.816
H4 C1 H5 109.124 H4 C1 H6 109.124
H5 C1 H6 109.124
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability