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 CH3SSCH3 (Disulfide, dimethyl)

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-876.079381
Energy at 298.15K-876.085448
Nuclear repulsion energy220.292907
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 B3PW91/6-31G*
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 3180 3042 5.19      
2 A 3164 3027 7.63      
3 A 3073 2940 16.37      
4 A 1500 1435 0.43      
5 A 1488 1424 7.87      
6 A 1382 1322 1.49      
7 A 994 951 7.63      
8 A 989 946 1.67      
9 A 707 676 0.08      
10 A 507 485 0.28      
11 A 230 220 1.65      
12 A 143 137 0.07      
13 A 101 96 1.53      
14 B 3180 3042 7.65      
15 B 3164 3027 3.48      
16 B 3071 2938 19.54      
17 B 1504 1439 21.37      
18 B 1482 1418 12.66      
19 B 1375 1316 3.34      
20 B 994 951 21.27      
21 B 984 941 3.89      
22 B 705 674 2.85      
23 B 259 248 1.58      
24 B 155 148 0.51      

Unscaled Zero Point Vibrational Energy (zpe) 17164.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 16421.4 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 B3PW91/6-31G*
ABC
0.27414 0.08990 0.08313

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.032 -0.492
S2 0.000 -1.032 -0.492
C3 1.224 1.456 0.791
C4 -1.224 -1.456 0.791
H5 1.310 2.548 0.780
H6 0.894 1.138 1.784
H7 2.197 1.017 0.560
H8 -1.310 -2.548 0.780
H9 -0.894 -1.138 1.784
H10 -2.197 -1.017 0.560

Atom - Atom Distances (Å)
  S1 S2 C3 C4 H5 H6 H7 H8 H9 H10
S12.06381.82373.05552.37292.44742.43644.01843.26903.1835
S22.06383.05551.82374.01843.26903.18352.37292.44742.4364
C31.82373.05553.80461.09531.09291.09234.73853.49304.2283
C43.05551.82373.80464.73853.49304.22831.09531.09291.0923
H52.37294.01841.09534.73851.78011.78305.72974.41045.0059
H62.44743.26901.09293.49301.78011.79154.41042.89463.9624
H72.43643.18351.09234.22831.78301.79155.00593.96244.8429
H84.01842.37294.73851.09535.72974.41045.00591.78011.7830
H93.26902.44743.49301.09294.41042.89463.96241.78011.7915
H103.18352.43644.22831.09235.00593.96244.84291.78301.7915

picture of Disulfide, dimethyl state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
S1 S2 C4 103.446 S1 C3 H5 106.059
S1 C3 H6 111.627 S1 C3 H7 110.831
S2 S1 C3 103.446 S2 C4 H8 106.059
S2 C4 H9 111.627 S2 C4 H10 110.831
H5 C3 H6 108.884 H5 C3 H7 109.184
H6 C3 H7 110.134 H8 C4 H9 108.884
H8 C4 H10 109.184 H9 C4 H10 110.134
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.025     -0.103
2 S 0.025     -0.105
3 C -0.661     -0.356
4 C -0.661     -0.337
5 H 0.211     0.174
6 H 0.205     0.146
7 H 0.219     0.138
8 H 0.211     0.169
9 H 0.205     0.141
10 H 0.219     0.133


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 2.305 2.305
CHELPG        
AIM        
ESP 0.001 -0.000 2.330 2.330


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.305 3.746 0.000
y 3.746 -37.476 0.000
z 0.000 0.000 -40.611
Traceless
 xyz
x 0.739 3.746 0.000
y 3.746 1.981 0.000
z 0.000 0.000 -2.720
Polar
3z2-r2-5.440
x2-y2-0.829
xy3.746
xz0.000
yz0.000


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> 157.532
(<r2>)1/2 12.551