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All results from a given calculation for HSCH2SH (Methanedithiol)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-831.675734
Energy at 298.15K 
HF Energy-831.296919
Nuclear repulsion energy140.836434
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 CCD/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 3088 2954 8.26      
2 A 2733 2614 3.23      
3 A 1542 1475 3.37      
4 A 1271 1216 1.11      
5 A 954 912 5.27      
6 A 639 611 3.34      
7 A 305 292 19.49      
8 A 251 240 6.64      
9 B 3138 3002 1.06      
10 B 2732 2613 7.71      
11 B 1335 1277 12.43      
12 B 1064 1017 24.79      
13 B 763 730 1.20      
14 B 749 717 17.75      
15 B 259 248 43.79      

Unscaled Zero Point Vibrational Energy (zpe) 10410.6 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 9957.7 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 CCD/3-21G*
ABC
0.86277 0.10479 0.09778

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.797
S2 0.000 1.550 -0.184
S3 0.000 -1.550 -0.184
H4 0.885 -0.048 1.440
H5 -0.885 0.048 1.440
H6 1.109 1.270 -0.889
H7 -1.109 -1.270 -0.889

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.83381.83381.09491.09492.38402.3840
S21.83383.09932.44382.38171.34333.1110
S31.83383.09932.38172.44383.11101.3433
H41.09492.44382.38171.77262.68493.2999
H51.09492.38172.44381.77263.29992.6849
H62.38401.34333.11102.68493.29993.3725
H72.38403.11101.34333.29992.68493.3725

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 96.011 C1 S3 H7 96.011
S2 C1 S3 115.355 S2 C1 H4 110.562
S2 C1 H5 106.062 S3 C1 H4 106.062
S3 C1 H5 110.562 H4 C1 H5 108.087
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability