Syntheses and Reactivity of Ruthenium σ-Pyridylacetylides

Citations Over TimeTop 10% of 1997 papers

Abstract

Ruthenium σ-acetylides containing a dangling pyridine were synthesized from the reactions of CpRu(L)2Cl (L = PPh3, 1/2 (C5H4PPh2)2Fe) with 4-ethynylpyridine, (E)-1-(4-ethynylphenyl)-2-(4-pyridyl)ethylene, or 4-(ethynylphenyl)(4-pyridyl)acetylene in the presence of NH4+PF6- followed by deprotonation with a base. The dangling pyridine can be protonated, methylated, or ligated to tungsten carbonyl fragments. The ruthenium donor to the pyridinium acceptor charge-transfer absorption appears at longer wavelength as the conjugation chain becomes longer. The quadratic hyperpolarizabilities of the methylated derivatives were determined using the hyper Rayleigh scattering method. X-ray analysis was employed to examine the structure of the dinuclear complex Ru(C⋮CC5H4N{W(CO)4(PPh3)})(η2-dppf)(η5-C5H5) (dppf = 1,1‘-bis(diphenylphosphino)ferrocene).

Related Papers

• → Synthesis and characterisation of mono-acetylide and unsymmetrical bis-acetylide complexes of ruthenium and osmium: X-ray structure determinations on [(dppe)2Ru(Cl)(CC–C6H4-p-NO2)], [(dppe)2Ru(Cl)(CC–C6H3-o-CH3-p-NO2)] and [(dppm)2Os(CC–C6H4-p-CH3)(CC–C6H4-p-NO2)](1999)59 cited
• → Partially and fully deprotonated sulfuric acid in H2SO4(H2O) (n=6–9) clusters(2004)45 cited
• → Möissbauer Study of Fullerene (Ferrocene)₂and Decamethyl-Ferrocene(1997)11 cited
• → Deprotonation and acidity characterization of biomass sugars: a first-principles study(2016)6 cited
• → Deprotonation of lipid-depleted bacteriorhodopsin.(1988)29 cited