In 2019,ChemPhysChem included an article by Demaison, Jean; Vogt, Natalja; Saragi, Rizalina Tama; Juanes, Marcos; Rudolph, Heinz Dieter; Lesarri, Alberto. Quality Control of 1,2-Diphenyldisulfane. The article was titled 《The S-S Bridge: A Mixed Experimental-Computational Estimation of the Equilibrium Structure of Diphenyl Disulfide》. The information in the text is summarized as follows:
The disulfide bridge (-S-S-) is an important structural motif in organic and protein chem., but only a few accurate equilibrium structures are documented. We report the results of supersonic-jet microwave spectroscopy experiments on the rotational spectra of di-Ph disulfide, C6H5-S-S-C6H5 (including all 13C and 34S monosubstituted isotopologues), and the determination of the equilibrium structure by the mixed estimation (ME) method. A single conformation of C2 symmetry was observed in the gas phase. This disulfide is a challenging target since its structure is determined by 34 independent parameters. Addnl., ab initio calculations revealed the presence of three low-frequency vibrations (<50 cm-1) associated to Ph torsions which would prevent the calculation of an accurate force field. For this reason, instead of the semiexperimental method, we used the mass-dependent (rm) method to fit the structural parameters concurrently to moments of inertia and predicate parameters, affected with appropriate uncertainties. The predicates were obtained by high-level quantum-chem. computations. A careful anal. of the results of different fits and a comparison with the ab initio optimizations confirms the validity of the used methods, providing detailed structural information on the title compound and the disulfide bridge. In the experimental materials used by the author, we found 1,2-Diphenyldisulfane(cas: 882-33-7Quality Control of 1,2-Diphenyldisulfane)
1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers.The C-O bonds that comprise simple ethers are strong. Quality Control of 1,2-Diphenyldisulfane They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem