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: HF/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at HF/6-31G(2df,p)
 hartrees
Energy at 0K-874.279185
Energy at 298.15K-874.285563
Nuclear repulsion energy222.182936
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 HF/6-31G(2df,p)
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 3296 2985 7.26      
2 A 3277 2967 8.25      
3 A 3191 2889 21.66      
4 A 1598 1447 0.31      
5 A 1585 1435 5.23      
6 A 1481 1341 3.87      
7 A 1059 959 3.83      
8 A 1059 959 0.12      
9 A 764 692 1.01      
10 A 556 504 0.44      
11 A 253 229 1.26      
12 A 167 151 0.03      
13 A 104 94 1.69      
14 B 3295 2984 11.21      
15 B 3275 2966 8.34      
16 B 3189 2887 29.89      
17 B 1602 1450 13.28      
18 B 1580 1430 7.42      
19 B 1472 1333 14.37      
20 B 1064 963 14.34      
21 B 1049 950 1.21      
22 B 757 685 1.37      
23 B 284 257 1.08      
24 B 176 159 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 18065.7 cm-1
Scaled (by 0.9055) Zero Point Vibrational Energy (zpe) 16358.5 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 HF/6-31G(2df,p)
ABC
0.27813 0.09152 0.08456

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.022 -0.489
S2 0.000 -1.022 -0.489
C3 1.215 1.443 0.787
C4 -1.215 -1.443 0.787
H5 1.289 2.525 0.789
H6 0.890 1.110 1.763
H7 2.179 1.016 0.549
H8 -1.289 -2.525 0.789
H9 -0.890 -1.110 1.763
H10 -2.179 -1.016 0.549

Atom - Atom Distances (Å)
  S1 S2 C3 C4 H5 H6 H7 H8 H9 H10
S12.04451.81193.03062.35642.42302.41343.98473.22613.1590
S22.04453.03061.81193.98473.22613.15902.35642.42302.4134
C31.81193.03063.77361.08421.08141.08084.69263.44984.1984
C43.03061.81193.77364.69263.44984.19841.08421.08141.0808
H52.35643.98471.08424.69261.76431.76805.67034.34844.9624
H62.42303.22611.08143.44981.76431.77344.34842.84463.9256
H72.41343.15901.08084.19841.76801.77344.96243.92564.8084
H83.98472.35644.69261.08425.67034.34844.96241.76431.7680
H93.22612.42303.44981.08144.34842.84463.92561.76431.7734
H103.15902.41344.19841.08084.96243.92564.80841.76801.7734

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 103.439 S1 C3 H5 106.173
S1 C3 H6 111.225 S1 C3 H7 110.531
S2 S1 C3 103.439 S2 C4 H8 106.173
S2 C4 H9 111.225 S2 C4 H10 110.531
H5 C3 H6 109.111 H5 C3 H7 109.496
H6 C3 H7 110.206 H8 C4 H9 109.111
H8 C4 H10 109.496 H9 C4 H10 110.206
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S -0.056      
2 S -0.056      
3 C -0.450      
4 C -0.450      
5 H 0.169      
6 H 0.161      
7 H 0.175      
8 H 0.169      
9 H 0.161      
10 H 0.175      


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 2.270 2.270
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.801 3.705 0.000
y 3.705 -37.929 0.000
z 0.000 0.000 -41.007
Traceless
 xyz
x 0.667 3.705 0.000
y 3.705 1.975 0.000
z 0.000 0.000 -2.641
Polar
3z2-r2-5.283
x2-y2-0.872
xy3.705
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.696 1.509 0.000
y 1.509 10.357 0.000
z 0.000 0.000 7.438


<r2> (average value of r2) Å2
<r2> 155.504
(<r2>)1/2 12.470