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: mPW1PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at mPW1PW91/6-31G
 hartrees
Energy at 0K-876.115630
Energy at 298.15K-876.121515
Nuclear repulsion energy212.131338
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 mPW1PW91/6-31G
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 3236 3063 5.39      
2 A 3218 3046 6.30      
3 A 3107 2941 14.84      
4 A 1523 1442 0.01      
5 A 1511 1431 14.12      
6 A 1406 1331 0.78      
7 A 1013 958 10.74      
8 A 1010 956 1.23      
9 A 677 641 0.90      
10 A 446 422 0.02      
11 A 205 194 1.42      
12 A 134 127 0.07      
13 A 82 78 2.23      
14 B 3236 3063 5.99      
15 B 3217 3045 1.04      
16 B 3106 2940 13.57      
17 B 1527 1446 31.22      
18 B 1507 1426 17.95      
19 B 1400 1325 1.51      
20 B 1013 959 24.03      
21 B 1007 954 4.87      
22 B 675 639 1.11      
23 B 230 217 2.14      
24 B 144 136 0.68      

Unscaled Zero Point Vibrational Energy (zpe) 17314.5 cm-1
Scaled (by 0.9466) Zero Point Vibrational Energy (zpe) 16389.9 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 mPW1PW91/6-31G
ABC
0.25249 0.08270 0.07756

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 -0.495 0.993 -0.503
S2 0.495 -0.993 -0.503
C3 0.495 1.890 0.815
C4 -0.495 -1.890 0.815
H5 0.108 2.910 0.830
H6 0.347 1.425 1.788
H7 1.549 1.896 0.545
H8 -0.108 -2.910 0.830
H9 -0.347 -1.425 1.788
H10 -1.549 -1.896 0.545

Atom - Atom Distances (Å)
  S1 S2 C3 C4 H5 H6 H7 H8 H9 H10
S12.21971.87603.17002.41122.47902.46804.14293.33493.2492
S22.21973.17001.87604.14293.33493.24922.41122.47902.4680
C31.87603.17003.90651.09141.08871.08824.83733.55564.3101
C43.17001.87603.90654.83733.55564.31011.09141.08871.0882
H52.41124.14291.09144.83731.78351.78525.82404.46295.0912
H62.47903.33491.08873.55561.78351.79204.46292.93334.0207
H72.46803.24921.08824.31011.78521.79205.09124.02074.8961
H84.14292.41124.83731.09145.82404.46295.09121.78351.7852
H93.33492.47903.55561.08874.46292.93334.02071.78351.7920
H103.24922.46804.31011.08825.09124.02074.89611.78521.7920

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 101.092 S1 C3 H5 105.628
S1 C3 H6 110.655 S1 C3 H7 109.864
S2 S1 C3 101.092 S2 C4 H8 105.628
S2 C4 H9 110.655 S2 C4 H10 109.864
H5 C3 H6 109.780 H5 C3 H7 109.977
H6 C3 H7 110.811 H8 C4 H9 109.780
H8 C4 H10 109.977 H9 C4 H10 110.811
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.065      
2 S 0.065      
3 C -0.713      
4 C -0.713      
5 H 0.216      
6 H 0.208      
7 H 0.224      
8 H 0.216      
9 H 0.208      
10 H 0.224      


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 2.644 2.644
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -41.851 2.519 0.000
y 2.519 -34.809 0.000
z 0.000 0.000 -41.372
Traceless
 xyz
x -3.761 2.519 0.000
y 2.519 6.802 0.000
z 0.000 0.000 -3.042
Polar
3z2-r2-6.084
x2-y2-7.042
xy2.519
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.569 -0.520 0.000
y -0.520 11.745 0.000
z 0.000 0.000 6.828


<r2> (average value of r2) Å2
<r2> 167.364
(<r2>)1/2 12.937