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 CH2CS (Thioketene)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-472.402746
Energy at 298.15K 
HF Energy-472.085078
Nuclear repulsion energy78.389974
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/3-21G*
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 3187 3022 25.45 146.35 0.12 0.22
2 A1 1823 1728 258.16 0.43 0.19 0.33
3 A1 1486 1409 3.10 20.83 0.57 0.73
4 A1 860 815 5.65 21.75 0.31 0.48
5 B1 798 757 115.34 0.32 0.75 0.86
6 B1 397 376 2.29 1.55 0.75 0.86
7 B2 3268 3099 1.90 100.63 0.75 0.86
8 B2 1033 980 0.68 0.88 0.75 0.86
9 B2 355 336 2.68 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6603.8 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 6260.4 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/3-21G*
ABC
9.67767 0.18640 0.18288

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.765
C2 0.000 0.000 -0.446
S3 0.000 0.000 1.120
H4 0.000 0.930 -2.326
H5 0.000 -0.930 -2.326

Atom - Atom Distances (Å)
  C1 C2 S3 H4 H5
C11.31902.88531.08551.0855
C21.31901.56642.09682.0968
S32.88531.56643.56903.5690
H41.08552.09683.56901.8592
H51.08552.09683.56901.8592

picture of Thioketene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 S3 180.000 C2 C1 H4 121.085
C2 C1 H5 121.085 H4 C1 H5 117.829
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability