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 CH2SHCH2SH (1,2-Ethanedithiol)

using model chemistry: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-876.193190
Energy at 298.15K-876.199357
Nuclear repulsion energy202.464558
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 mPW1PW91/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3097 2947 0.00      
2 Ag 2734 2603 0.00      
3 Ag 1502 1429 0.00      
4 Ag 1354 1289 0.00      
5 Ag 1121 1067 0.00      
6 Ag 912 868 0.00      
7 Ag 752 715 0.00      
8 Ag 283 269 0.00      
9 Au 3173 3020 4.81      
10 Au 1144 1089 6.12      
11 Au 788 750 3.51      
12 Au 146 139 27.29      
13 Au 86 82 29.91      
14 Bg 3152 3000 0.00      
15 Bg 1310 1247 0.00      
16 Bg 984 937 0.00      
17 Bg 145 138 0.00      
18 Bu 3105 2955 23.18      
19 Bu 2735 2603 15.73      
20 Bu 1501 1428 6.58      
21 Bu 1265 1204 57.02      
22 Bu 905 861 4.62      
23 Bu 736 701 7.16      
24 Bu 202 192 9.14      

Unscaled Zero Point Vibrational Energy (zpe) 16565.1 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 15766.7 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 mPW1PW91/6-31+G**
ABC
0.84026 0.05075 0.04874

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.760 0.000
C2 0.000 -0.760 0.000
S3 1.738 -1.335 0.000
S4 -1.738 1.335 0.000
H5 1.465 -2.651 0.000
H6 -1.465 2.651 0.000
H7 -0.510 -1.137 0.889
H8 -0.510 -1.137 -0.889
H9 0.510 1.137 0.889
H10 0.510 1.137 -0.889

Atom - Atom Distances (Å)
  C1 C2 S3 S4 H5 H6 H7 H8 H9 H10
C11.51962.72241.83123.71202.39212.15572.15571.09211.0921
C21.51961.83122.72242.39213.71201.09211.09212.15572.1557
S32.72241.83124.38411.34365.11392.42602.42602.89992.8999
S41.83122.72244.38415.11391.34362.89992.89992.42602.4260
H53.71202.39211.34365.11396.05752.64292.64294.00584.0058
H62.39213.71205.11391.34366.05754.00584.00582.64292.6429
H72.15571.09212.42602.89992.64294.00581.77822.49153.0610
H82.15571.09212.42602.89992.64294.00581.77823.06102.4915
H91.09212.15572.89992.42604.00582.64292.49153.06101.7782
H101.09212.15572.89992.42604.00582.64293.06102.49151.7782

picture of 1,2-Ethanedithiol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 S3 108.319 C1 C2 H7 110.179
C1 C2 H8 110.179 C1 S4 H6 96.582
C2 C1 S4 108.319 C2 C1 H9 110.179
C2 C1 H10 110.179 C2 S3 H5 96.582
S3 C2 H7 109.574 S3 C2 H8 109.574
S4 C1 H9 109.574 S4 C1 H10 109.574
H7 C2 H8 109.002 H9 C1 H10 109.002
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.440      
2 C -0.440      
3 S -0.076      
4 S -0.076      
5 H 0.081      
6 H 0.081      
7 H 0.218      
8 H 0.218      
9 H 0.218      
10 H 0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 214.160
(<r2>)1/2 14.634