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: 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-870.556723
Energy at 298.15K-870.562961
HF Energy-870.125885
Nuclear repulsion energy221.785278
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 3192 3037 3.77      
2 A 3174 3019 6.97      
3 A 3091 2941 14.22      
4 A 1579 1502 0.55      
5 A 1567 1491 8.33      
6 A 1458 1387 0.55      
7 A 1050 998 5.48      
8 A 1042 991 3.08      
9 A 702 668 0.26      
10 A 525 500 0.29      
11 A 244 232 1.33      
12 A 154 147 0.01      
13 A 107 102 1.38      
14 B 3192 3036 7.54      
15 B 3173 3019 3.42      
16 B 3090 2940 12.17      
17 B 1583 1506 18.69      
18 B 1561 1485 12.63      
19 B 1450 1380 1.82      
20 B 1050 999 20.34      
21 B 1040 990 3.63      
22 B 698 664 0.95      
23 B 278 265 1.14      
24 B 168 160 0.42      

Unscaled Zero Point Vibrational Energy (zpe) 17583.9 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 16727.5 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 MP2/3-21G*
ABC
0.26422 0.09398 0.08548

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 1.021 -0.509
S2 0.000 -1.021 -0.509
C3 1.203 1.401 0.819
C4 -1.203 -1.401 0.819
H5 1.296 2.492 0.858
H6 0.845 1.036 1.784
H7 2.173 0.958 0.587
H8 -1.296 -2.492 0.858
H9 -0.845 -1.036 1.784
H10 -2.173 -0.958 0.587

Atom - Atom Distances (Å)
  S1 S2 C3 C4 H5 H6 H7 H8 H9 H10
S12.04171.83183.01282.39022.44392.43503.98583.19423.1369
S22.04173.01281.83183.98583.19423.13692.39022.44392.4350
C31.83183.01283.69381.09501.09261.09164.62633.32664.1256
C43.01281.83183.69384.62633.32664.12561.09501.09261.0916
H52.39023.98581.09504.62631.78331.78755.61724.22914.9001
H62.44393.19421.09263.32661.78331.79004.22912.67363.8103
H72.43503.13691.09164.12561.78751.79004.90013.81034.7503
H83.98582.39024.62631.09505.61724.22914.90011.78331.7875
H93.19422.44393.32661.09264.22912.67363.81031.78331.7900
H103.13692.43504.12561.09164.90013.81034.75031.78751.7900

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 101.983 S1 C3 H5 106.780
S1 C3 H6 110.833 S1 C3 H7 110.216
S2 S1 C3 101.983 S2 C4 H8 106.780
S2 C4 H9 110.833 S2 C4 H10 110.216
H5 C3 H6 109.207 H5 C3 H7 109.663
H6 C3 H7 110.076 H8 C4 H9 109.207
H8 C4 H10 109.663 H9 C4 H10 110.076
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability