Abstract: The present invention relates to a process for hydrosilylating an unsaturated compound with a compound comprising at least one hydrogenosilyl function catalysed by organic cobalt compounds in the presence of a compound (E) having the formula (3): R?—OH (3), wherein R? represents the hydrogen atom or R? is chosen from the group consisting of alkyl groups having 1 to 8 carbon atoms, cycloalkyl groups having 6 to 12 carbon atoms, aryl groups having 6 to 12 carbon atoms, aryl-alkyl groups, and silyl groups.

Abstract: The present invention relates to a method for hydrosilylation of an unsaturated compound comprising at least one alkene function or one alkyne function with a compound comprising at least one hydrosilane function, said method being catalysed by an iron complex represented by the formula Fe[Si(SiR3)3]2 Ln, wherein each R is a hydrogen atom or a hydrocarbon group having 1 to 30 carbon atoms, optionally substituted by one or more halogen atoms, each L is an ether ligand, and n=1, 2 or 3. The present invention also relates to a method for preparing said iron complex, as well as to the use thereof as a catalyst for the hydrosilylation of an alkene or alkyne.