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: MP4/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP4/TZVP
 hartrees
Energy at 0K-835.756848
Energy at 298.15K 
HF Energy-835.270050
Nuclear repulsion energy140.759074
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 MP4/TZVP
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 3108 2993        
2 A 2734 2632        
3 A 1447 1394        
4 A 1209 1164        
5 A 911 877        
6 A 643 619        
7 A 300 289        
8 A 224 216        
9 B 3174 3056        
10 B 2733 2632        
11 B 1301 1253        
12 B 1018 980        
13 B 772 743        
14 B 717 691        
15 B 257 247        

Unscaled Zero Point Vibrational Energy (zpe) 10273.4 cm-1
Scaled (by 0.9629) Zero Point Vibrational Energy (zpe) 9892.2 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 MP4/TZVP
ABC
0.88566 0.10365 0.09710

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/TZVP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.782
S2 0.000 1.558 -0.181
S3 0.000 -1.558 -0.181
H4 0.881 -0.055 1.419
H5 -0.881 0.055 1.419
H6 1.116 1.286 -0.876
H7 -1.116 -1.286 -0.876

Atom - Atom Distances (Å)
  C1 S2 S3 H4 H5 H6 H7
C11.83121.83121.08921.08922.37632.3763
S21.83123.11602.43662.36571.34283.1333
S31.83123.11602.36572.43663.13331.3428
H41.08922.43662.36571.76592.66843.2823
H51.08922.36572.43661.76593.28232.6684
H62.37631.34283.13332.66843.28233.4057
H72.37633.13331.34283.28232.66843.4057

picture of Methanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 S2 H6 95.724 C1 S3 H7 95.724
S2 C1 S3 116.604 S2 C1 H4 110.510
S2 C1 H5 105.363 S3 C1 H4 105.363
S3 C1 H5 110.510 H4 C1 H5 108.321
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability