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All results from a given calculation for CH3CHS (Thioacetaldehyde)

using model chemistry: QCISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-476.005570
Energy at 298.15K-476.009378
HF Energy-475.559642
Nuclear repulsion energy92.539160
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/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3214 3038 10.73      
2 A' 3164 2992 19.93      
3 A' 3087 2919 9.84      
4 A' 1528 1445 4.79      
5 A' 1451 1372 25.61      
6 A' 1428 1350 37.00      
7 A' 1193 1127 27.49      
8 A' 1112 1051 4.55      
9 A' 846 800 0.15      
10 A' 402 380 1.00      
11 A" 3155 2983 11.32      
12 A" 1516 1433 8.42      
13 A" 1071 1013 7.23      
14 A" 777 734 14.33      
15 A" 159 150 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 12051.1 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 11393.1 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/6-31+G**
ABC
1.63063 0.18933 0.17513

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.626 0.000
C2 -1.498 0.714 0.000
S3 0.881 -0.743 0.000
H4 0.516 1.586 0.000
H5 -1.952 -0.275 0.000
H6 -1.834 1.270 0.880
H7 -1.834 1.270 -0.880

Atom - Atom Distances (Å)
  C1 C2 S3 H4 H5 H6 H7
C11.50031.62751.08992.14992.13372.1337
C21.50032.78902.19441.08811.09351.0935
S31.62752.78902.35702.87133.49213.4921
H41.08992.19442.35703.09102.52922.5292
H52.14991.08812.87133.09101.78131.7813
H62.13371.09353.49212.52921.78131.7591
H72.13371.09353.49212.52921.78131.7591

picture of Thioacetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.323 C1 C2 H6 109.694
C1 C2 H7 109.694 C2 C1 S3 126.126
C2 C1 H4 114.892 S3 C1 H4 118.982
H5 C2 H6 109.470 H5 C2 H7 109.470
H6 C2 H7 107.093
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability