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 OCS (Carbonyl sulfide)

using model chemistry: MP2/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-31.318825
Energy at 298.15K-31.318514
HF Energy-31.030848
Nuclear repulsion energy24.864542
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/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 1893 1848 551.84 27.29 0.32 0.48
2 Σ 786 767 6.02 41.66 0.26 0.41
3 Π 432 421 0.33 2.88 0.75 0.86
3 Π 432 421 0.33 2.88 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1770.7 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 1728.2 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 MP2/CEP-121G
B
0.18454

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.548
O2 0.000 0.000 -1.766
S3 0.000 0.000 1.088

Atom - Atom Distances (Å)
  C1 O2 S3
C11.21781.6364
O21.21782.8542
S31.63642.8542

picture of Carbonyl sulfide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 C1 S3 180.000
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability