development of aryl alkyl sulfides as dichotomous electrophiles for the site-selective silylation via C−S bond cleavage has been achieved. The iron-catalyzed selective cleavage of C(aryl)−S bonds can occur in the presence of β-diketimine ligands, while the cleavage of C(alkyl)−S bonds can be achieved by t-BuONa without the use of any transition metal, resulting in the corresponding silylated products