“…For example, the bis-sulfoxide derivatives are used as ligands in the stabilisation of transition metal or lanthanide complexes or as ligand in transition metal-catalyzed reactions or in various catalytic processes. [5,7,[9][10][11][12][13][14][15][16][17][18] In most of the cases the coordination to the metal center is realized through the sulfur atom of the sulfinyl group, [5,11,14,15,[18][19][20][21][22][23] however, coordination through the oxygen atom is also a possibility, some examples are presented in the literature. [12,14,[23][24][25][26] The synthesis of the sulfoxides can be realized by different methods such as the arylation of sulfenate anions by a coupling reaction, a nucleophilic substitution or an electrophilic attack, with the formation of a C-SO bond, [27][28][29][30][31] or by oxidation of a sulfide through a thioether as intermediary derivative.…”