Ruthenium chelates

F. E. Lyttle and D. M. Hercules 161) investigated the energetic relations in the chemiluminescent reaction of ruthenium chelate complexes (Ru-III-2.2 -bipyridyI-, — 5-methyl-1.10-phenanthrolin — and other complexes) with hydroxyl ion or hydrazide. The general reaction is... 

Ru(II)) excited ruthenium chelate, ligands omitted as well as in Ru(III). 

With 17 now readily available, we proceeded to the key RCM reaction. Our first results, using Grubbs s catalyst [Ru]-b (see Scheme 6) were not encouraging as cyclization products were obtained in only 11 % yield along with unidentified material. Addition of Ti(OiPr)4 (to disrupt the potential stable ruthenium chelate) (Figure 3) did not improve the yield and led to the formation of decomposition products. 

Calculate (3 for this column, and for both the beryllium and the cobalt chelates calculate the following parameters Vr, VN, k, Rr, K, n, and H. For the unresolved mixture of chromium and ruthenium chelates, calculate the resolution, Rs, assuming that the peaks are of equal height. 

Electrochemiluminescence (ECL) is a homogeneous, bead-based technology using the Origen platform. ECL utilises ruthenium chelates conjugated to an... 

Respectable results for the ruthenium chelate-catalyzed reduction of y9-ketoesters were also obtained by Pye [49] with 2.2-PHANEPHOS (24) and Imamoto [50] with 10a as the ligand. 

As of 2004, the College of American Pathologists Interlaboratory Survey listed five manufacturers as providing first generation noncompetitive immunoassays for intact PTH. Most of these commercially available methods are on fully automated immunoassay analyzers using chemiluminescence detection including ALP with 1,2-dioxetane phosphate, acridinium ester, or electrochemiluminescence (ruthenium chelate). Signal antibody is less commonly radiolabeled with L... 

The chiral ruthenium chelate complexes were tested as catalysts in the reconstitutive addition reaction of 288 and 289 to give 290. In some cases the chemical yields were good however, the ee remained rather low. It has been discussed whether this is the result of a poor enantioselectivity of the catalysis or a racemization process of the product. Van der Zeijden obtained chiral diastereomeric chelates 314 and 315 in nonracemic form (66% ee) by treatment of ligand (5)-49 (66% ee) with RuCp-... 

With the exception of a few rare examples from the chemistry of molybdenum, manganese, rhenium, iron, and ruthenium, chelate complexes of O-func-tionalized cyclopentadienyl ligands have only been reported in this category for the very oxophilic group 4 metals, preferentially in their highest and most Lewis acidic oxidation state. Linked alkoxo— or aryloxo—cyclopentadienyl and ether—cyclopentadienyl systems are almost equally abundant for these metals. 

Pautzsch, T. and E. Klemm, 2002. Ruthenium-chelating poly(heteroaryleneethynylene)s Synthesis and properties. Macromolecules 35 1569. 

Michel PE, de Rooij NF, Koudelka-Hep M, Fahnrich KA, O Sullivan CK, Guilbault GG (1999) Redox-cycling type electrochemilurainescence in aqueous medium. A new principle for the detection of proteins labeled with a ruthenium chelate. J Electroanal Chem 474(2) 192-194. doi 10.1016/S0022-0728(99)00351 ... 

High MW, rigid-rod, conjugated transition metal acetylide polymers (42, Scheme 10) were synthesized by reaction of the dichloro iron or ruthenium chelated diphosphine complexes (40) with a te-trimethylstannylacetylide monomer (41). Reaction of the rhodium complex 43 with an equimolar amount of compound 44 gave a rigid-rod acetylide organometallic polymer 45 (Scheme 11). This ihodium-containing polymer was soluble in THE... 

This first example of ruthenium chelate ECL was followed by investigations of several other ruthenium complexes, the ligands of which were (8) [21] ... 

A description of the electrochemical processes occurring during ECL of these ruthenium chelate complexes, especially the (Ru(bipy)3 complexes in terms of the corresponding MO diagram has been given [21]. 

Ruthenium chelates of 2,2 -bipyridyl (15), 5-methyl-o-phenanthroline (16) and the similar compounds (17) and (18) were investigated. 

---