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All results from a given calculation for CH3SH (Methanethiol)

using model chemistry: QCISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-435.885364
Energy at 298.15K-435.889257
HF Energy-435.636461
Nuclear repulsion energy55.795184
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/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 A' 3125 3004 8.25      
2 A' 3050 2932 20.82      
3 A' 2713 2607 15.92      
4 A' 1569 1508 8.54      
5 A' 1449 1392 3.95      
6 A' 1152 1107 19.41      
7 A' 838 806 1.73      
8 A' 698 670 1.81      
9 A" 3129 3007 11.77      
10 A" 1559 1498 6.65      
11 A" 1028 988 6.37      
12 A" 251 241 18.54      

Unscaled Zero Point Vibrational Energy (zpe) 10279.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 9879.8 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/3-21G*
ABC
3.40432 0.42153 0.40433

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.048 1.166 0.000
S2 -0.048 -0.673 0.000
H3 1.288 -0.824 0.000
H4 -1.099 1.480 0.000
H5 0.439 1.561 0.898
H6 0.439 1.561 -0.898

Atom - Atom Distances (Å)
  C1 S2 H3 H4 H5 H6
C11.83972.39691.09681.09541.0954
S21.83971.34452.39652.45692.4569
H32.39691.34453.31762.68572.6857
H41.09682.39653.31761.78321.7832
H51.09542.45692.68571.78321.7960
H61.09542.45692.68571.78321.7960

picture of Methanethiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H3 96.422 S2 C1 H4 106.648
S2 C1 H5 111.119 S2 C1 H6 111.119
H4 C1 H5 108.860 H4 C1 H6 108.860
H5 C1 H6 110.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability