Amphoteric allenylidene ruthenium complexes and the first dinuclear ruthenium species with a bis-alkenyl carbyne bridging ligand

Stéphane Rigaut , D Touchard , Ph Dixneuf (1)

1 IBCP - Institut de biologie et chimie des protéines [Lyon]

Cationic ruthenium(II) allenylidenes trans-[Cl(dppe)(2)Ru=C=C=C(CH3)R]BF4 (R = Ph, CH3) can be deprotonated to generate neutral alkenyl acetylide metal trans- [Cl(dppe)(2)Ru-CdropC-C(=CH2)R] or protonated with HBF4.Et2O to lead to dicationic ruthenium(II) carbynes trans-[Cl(dppe)(2)RudropC-CH=C(CH3)R] (BF4)(2). The latter reaction was applied to transform a conjugated bis-allenylidene bridged diruthenium complex, trans-[Cl(dppe)(2)Ru=C=C=C(CH3)-p-C6H4-(CH3)C=C=C=Ru(dppe)(2)Cl](BF4)( 2), into the first bis-alkenyl carbyne ruthenium species trans-[Cl(dppe)(2)RudropC-CH=C(CH3)-p-C6H4-(CH3)C=HC-CdropRu(dppe)(2)C l](BF4)(4).

Domaines: Chimie

Stéphane Rigaut, D Touchard, Ph Dixneuf. Amphoteric allenylidene ruthenium complexes and the first dinuclear ruthenium species with a bis-alkenyl carbyne bridging ligand. Organometallics, 2003, 22 (20), pp.3980--3984. ⟨10.1021/om0304098⟩. ⟨hal-01475058⟩