Crosslinkable silicone composition by desydrogenocondensation in the presence of a metal catalyst

The invention relates to a silicone composition crosslinkable by dehydrocondensation between reactifs≡SiH and ≡SiOH units, using a catalytic iridium obtainable by reacting together complex: - firstly an iridium complex of formula (I): (IrΣΣ'2) nwherein: a / n is 1 or 2 and if n is 1, Σ is a radical ligand LX 3 electrons, when n is 2, Σ is a radical ligand X 1 electron behaving like a ligand LX electrons 3 with the two atoms iridiumB / Σ ', which are identical or different, preferably identical, each represent a 2-electron ligand L, - on the other hand, a ligand selected from Σd R2S, R 2 O, NR 3, carbenes and organophosphates.