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All results from a given calculation for CH3SSCH3 (Disulfide, dimethyl)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-870.208948
Energy at 298.15K-870.214783
HF Energy-869.905908
Nuclear repulsion energy209.126547
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 MP2/3-21G
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 3233 3086 3.38      
2 A 3212 3066 5.00      
3 A 3117 2975 13.00      
4 A 1570 1499 0.14      
5 A 1563 1491 9.86      
6 A 1429 1364 2.47      
7 A 1009 963 6.07      
8 A 1008 962 1.56      
9 A 642 613 1.44      
10 A 417 398 0.00      
11 A 195 187 0.93      
12 A 137 131 0.00      
13 A 79 75 1.55      
14 B 3233 3086 5.57      
15 B 3211 3065 0.95      
16 B 3117 2975 6.77      
17 B 1574 1503 20.30      
18 B 1557 1486 12.72      
19 B 1421 1356 7.97      
20 B 1013 967 16.40      
21 B 1005 959 3.54      
22 B 639 610 1.02      
23 B 229 219 1.65      
24 B 151 144 0.46      

Unscaled Zero Point Vibrational Energy (zpe) 17381.0 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 16590.1 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 MP2/3-21G
ABC
0.23192 0.08305 0.07657

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
S1 0.000 1.148 -0.534
S2 0.000 -1.148 -0.534
C3 1.267 1.421 0.868
C4 -1.267 -1.421 0.868
H5 1.377 2.504 0.959
H6 0.883 1.000 1.796
H7 2.213 0.960 0.588
H8 -1.377 -2.504 0.959
H9 -0.883 -1.000 1.796
H10 -2.213 -0.960 0.588

Atom - Atom Distances (Å)
  S1 S2 C3 C4 H5 H6 H7 H8 H9 H10
S12.29511.90953.18902.44282.49692.48844.17863.29003.2558
S22.29513.18901.90954.17863.29003.25582.44282.49692.4884
C31.90953.18903.80781.09221.08961.08854.73343.36834.2258
C43.18901.90953.80784.73343.36834.22581.09221.08961.0885
H52.44284.17861.09224.73341.79081.79415.71524.25265.0025
H62.49693.29001.08963.36831.79081.79714.25262.66783.8580
H72.48843.25581.08854.22581.79411.79715.00253.85804.8243
H84.17862.44284.73341.09225.71524.25265.00251.79081.7941
H93.29002.49693.36831.08964.25262.66783.85801.79081.7971
H103.25582.48844.22581.08855.00253.85804.82431.79411.7971

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 98.239 S1 C3 H5 105.690
S1 C3 H6 109.670 S1 C3 H7 109.105
S2 S1 C3 98.239 S2 C4 H8 105.690
S2 C4 H9 109.670 S2 C4 H10 109.105
H5 C3 H6 110.324 H5 C3 H7 110.708
H6 C3 H7 111.186 H8 C4 H9 110.324
H8 C4 H10 110.708 H9 C4 H10 111.186
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 S 0.074     -0.110
2 S 0.074     -0.108
3 C -0.751     -0.325
4 C -0.751     -0.344
5 H 0.225     0.168
6 H 0.217     0.134
7 H 0.234     0.133
8 H 0.225     0.175
9 H 0.217     0.141
10 H 0.234     0.137


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 2.522 2.522
CHELPG        
AIM        
ESP 0.006 -0.010 2.484 2.484


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.374 3.680 0.000
y 3.680 -39.917 0.000
z 0.000 0.000 -42.763
Traceless
 xyz
x 0.966 3.680 0.000
y 3.680 1.651 0.000
z 0.000 0.000 -2.617
Polar
3z2-r2-5.235
x2-y2-0.457
xy3.680
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 11.165 0.000 -0.788
y 0.000 6.616 0.000
z -0.788 0.000 6.217


<r2> (average value of r2) Å2
<r2> 169.782
(<r2>)1/2 13.030