Ruthenium complexes tridentate

Ruthenium complexes of a novel silsesquioxane-based tridentate phosphine ligand have been prepared and characterized by Mitsudo et al The synthesis of the ligand 178 is depicted in Scheme 60. Reactions of 178 with several late transition metal complexes were examined. A typical example is the reaction with three equivalents of [RuCl2(cymene)]2, which produced the red triruthenium complex (c-C5H9)7Si709[0SiMe2CH2CH2PPh2RuCl2(cymene)]3 (179) in almost quantitative yield. 

The ligand Antpy is readily prepared (Figure 2), and consists of a tridentate tpy metalbinding domain to which a photoactive anthryl group is covalently attached [6]. The ligand shows a K-K absorption at 253 nm. The ruthenium complex [Ru(Antpy)2]2+ is readily... 

Regioselective C-H Activation of Cyclometalated Bis-Tridentate Ruthenium Complexes... 

A conjugated polymer that contains a tridentate 2,6- )w(benzimidazol-2-yljpyridine ligand coordinated to ruthenium has also been synthesized by Chan et al. (Scheme 20). ° Reaction of polymer 83 with 2,6-Z)i5 (benzimidazol-2-yl)pyridine ruthenium trichloride formed polymer 84. The complexation reactions were greater than 90% successful according to elemental analyses. While polymer 83 was luminescent, its ruthenium complexed form (84) was not luminescent because of photodissociation of the terminal benzimidazole... 

An air-stable acridine pincer complex 194 was quantitatively prepared on treatment of the tridentate PNP ligand 193 with a ruthenium complex and was applied as a catalyst for the direct synthesis of primary amines from alcohols and ammonia, Scheme 76 (2008AGE8661, 2011ACR588). 

Medlycott EA, Hanan GS (2005) Designing tridentate ligands for ruthenium(II) complexes with prolonged room temperature luminescence lifetimes. Chem Soc Rev 34 133-142... 

A tridentate (r 6 ri1 r 1) strapped arene complex of ruthenium(II), 20, containing a pair of auxiliary nitrogen donor atoms derived from (R, R)-1,2-diphenylethylenedi-amine, has been prepared by a sequence in which the functionalized arene is first coordinated to ruthenium(II), as shown in Scheme 5.25 The structure of 20 has been... 

A number of different methods have been employed during the past 50 years for the synthesis of tris-bidentate or bis-tridentate homochelated ruthenium(II) complexes. An examination of the various methods may lead the reader to a method best suited for a particular situation. 

In 1998, Galardon et al. [58] reported the crystal structure of tetraphenyl-porphyrinate-ruthenium-(diethoxycarbonyl)carbene complex 25, which exhibited catalytic activity for cyclopropanation of EDA and styrene, giving 85% of the product with 93 7 trans-to-cis ratio. The Ru-C distance is 1.829 A and the carbon resonance is at <5C=271.3 ppm. In 2000, Bianchini and Lee [59] isolated the similar ruthenium carbene complexes 26 with tridentate imine ligands and EDA Ru=CH-, <5H=20.44 ppm (s), <5C=299.9 ppm [59]. Simonneaux et al. [60] isolated the phosphonate carbene complexes of ruthenium porphyrins. 

The neutral 18-electron RuCl(Tp)(PPh3)(=C=CHPh) and RuCl(Cp )(PPh3)-(=C=CHPh) complexes also catalyse the ROMP of norbornene and their catalytic activity is enhanced by addition of a Lewis acid [66]. Other ruthenium vinylidene complexes featuring a bidentate (N,0) (M) [71] or a tridentate (N,N,N) (N) ligand [73] are also precatalysts of metathesis polymerisation. 

C. D., Plasmon light scattering in biology and medicine new sensing approaches, visions, and perspectives, Curr. Opin. Chem. Biol. 9,538-544, 2005 Medlycott, E.A. and Hanan, G.S., Designing tridentate ligands for ruthenium(II) complexes with prolonged room temperature luminescence lifetimes, Chem. Soc. Rev. 34, 133-142, 2005. 

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