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 HSCH2SH (Methanedithiol)

using model chemistry: QCISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-835.694249
Energy at 298.15K 
HF Energy-835.256310
Nuclear repulsion energy141.291303
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/6-311G*
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 3092 2961 11.97      
2 A 2619 2508 3.69      
3 A 1482 1419 1.91      
4 A 1252 1199 2.60      
5 A 927 887 5.76      
6 A 659 631 2.51      
7 A 304 291 16.38      
8 A 247 236 8.55      
9 B 3147 3013 2.09      
10 B 2619 2508 11.08      
11 B 1325 1269 21.74      
12 B 1044 999 35.24      
13 B 794 760 24.98      
14 B 728 697 1.05      
15 B 261 250 40.56      

Unscaled Zero Point Vibrational Energy (zpe) 10250.2 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 9813.5 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/6-311G*
ABC
0.89127 0.10463 0.09815

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.773
S2 0.000 1.549 -0.180
S3 0.000 -1.549 -0.180
H4 0.879 -0.052 1.420
H5 -0.879 0.052 1.420
H6 1.145 1.302 -0.852
H7 -1.145 -1.302 -0.852

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.81941.81941.09231.09232.37642.3764
S21.81943.09872.42832.36141.35003.1451
S31.81943.09872.36142.42833.14511.3500
H41.09232.42832.36141.76112.65793.2893
H51.09232.36142.42831.76113.28932.6579
H62.37641.35003.14512.65793.28933.4673
H72.37643.14511.35003.28932.65793.4673

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.013 C1 S3 H7 96.013
S2 C1 S3 116.763 S2 C1 H4 110.521
S2 C1 H5 105.659 S3 C1 H4 105.659
S3 C1 H5 110.521 H4 C1 H5 107.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability