Synthesis and characterization of bis(bipyridine)ruthenium(II) complexes with bromo or protected ethynyl β-diketonato ligands

Sabrina Munery (1) , Joël Jaud (2) , Jacques Bonvoisin (1)

1 CEMES-GNS - Groupe NanoSciences
2 CEMES - Centre d'élaboration de matériaux et d'études structurales

A protected ethynyl group was introduced into a beta-position of a (beta-diketonato)bis(bipyridine)ruthenium(II) complex through the reaction of the bromo complex and (triisopropylsilyl)-acetylene with very good yield under microwave irradiation. Two new mononuclear mixed-ligand ruthenium(II) complexes with bipyridine (bpy) and functionalized acetylacetonate ion (2,4-pentanedionate, acac-), [Ru(bpd)(bpy)2](PF6) (2; bpy = 2,2’-bipyridine, bpd = 3-Bromo-2,4-pentanedionate ion) and [Ru(tipsepd)(bpy)2](PF6) (3; tipsepd = 3-((Triisopropylsilyl)ethynil)-2,4-pentanedionate ion) were then prepared as candidates for building blocks. The 1H NMR, UV-Vis, electrochemistry and FAB mass spectral data of these complexes are presented. X-Ray single crystal diffraction analysis has been made on complex 2, it crystallized with empirical formula of C25H22BrF6N4O2PRu, in a monoclinic crystal system and space group C 2/c with a = 29.340(5) Å, b = 13.282(2) Å, c = 15.7492 (14) Å, beta = 109.452(8)°, V = 5786.9(13) Å3 and Z = 8.

Mots clés: Mixed ligands; Ruthenium compounds; Microwave irradiation synthesis; Diketone ligands; X-Ray structure; Acetylenic compounds

Domaines: Chimie de coordination

Sabrina Munery, Joël Jaud, Jacques Bonvoisin. Synthesis and characterization of bis(bipyridine)ruthenium(II) complexes with bromo or protected ethynyl β-diketonato ligands. Inorganic Chemistry Communications, 2008, 11 (9), pp.975-977. ⟨10.1016/j.inoche.2008.05.012⟩. ⟨hal-01737691⟩