Diamide bridge

Two of the phenolic groups in rerr-butyl-calix[4]arene were condensed with a ferrocene carboxylic diamide bridge, to give a receptor, 91, which electrochemically recognizes the H2P04 anion in the presence of excess HS04 and Cl [180]. Many similar derivatives have also been reported [181, 182]. 

Increasing the molecular weight by means of diamide bridges built from tri-mellitic acid and aromatic diamines, ... 

C-5 by way of a diamide bridge, a water-soluble receptor for hydrophobic groups. 

The novel tetrabasic ligand l,3-bis(5-methylpyrazole-3-carboxamido)propane forms a trinuc-lear Co111 Co11 Co111 complex (196). The tetradentate diamide-pyrazolyl chelates encircle the terminal trivalent metal ions while the central divalent Co is in a distorted tetrahedral environment provided by the four bridging pyrazolyl rings.881... 

Dithiocarbamates, in Ru and Os half-sandwiches, 6, 493 Dithiocarbenes, Pt complexes, 8, 439 Dithiocarboxy ligands, in molybdenum carbonyls, 5, 447 Dithiolate-bridged compounds in dinuclear iron compounds with Fe-Fe bonds, 6, 238 as iron-only hydrogenase biomimetic models, 6, 239 Dithiolate diamides, with Zr(IV), 4, 784 Dithiolene—uranium complexes, synthesis and characterization, 4, 212 Ditopic receptors, characteristics, 12, 489 Ditungsten complexes, associated reactions, 5, 748 Divinyllead diacetates... 

One of the main principles for chiral separation used in modern capillary GC is the bonding of the optically active compounds via hydrogen bridges to a stationary-phase material. Feibush and Gil-Av [8] suggested a rapid and reversible formation of association complexes between carbonyl and amide functions of selector and selectand. The formation of diastereomeric associates yields complexes of different stability, depending on the relative configuration. The introduction of dipeptide and diamide phases leads... 

Compound 38 is obtained, for example, by condensing 2-amino-4-methylphe-nol with maleic acid to yield the diamide. Ring closure and the formation of the ethylene bridge occur on heating in a mixture of diphenyl ether and diphenyl at 135-155 °C in the presence of boric acid [68],... 

Coordination of the diamide with the metal ion can occur in both a bidentate mode through both carbonyl oxygens or one carbonyl oxygen and the bridging oxygen/sulfur, or in a tridentate mode via both carbonyl oxygens and the bridging atom. ... 

The ferrocenyl-bridged dithiolate zirconium diamide complex 116 is readily obtained from the reaction of the ferrocenyl dithiol ligand and Zr(NMe2)4116 (Equation (8)). Treatment of 116 with trimethylaluminum followed by exposure to ethylene in the presence of MAO yields solid polyethylene, but the catalyst activity is low and the polymer produced has a very broad molecular weight distribution. 

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