Pyrazolates, ligand with rhodium complex

Pyrazine, bridged supramolecular complexes, 46 206-213, 240-243 p-Pyrazine complexes, osmium, 37 307 Pyrazolates, ligand with rhodium complex, 44 278 Pyrazoles... 

Bis(phosphoranimine) ligands, chromium complexes, 5, 359 Bis(pinacolato)diboranes activated alkene additions, 10, 731—732 for alkyl group functionalization, 10, 110 alkyne additions, 10, 728 allene additions, 10, 730 carbenoid additions, 10, 733 diazoalkane additions, 10, 733 imine additions, 10, 733 methylenecyclopropane additions, 10, 733 Bisporphyrins, in organometallic synthesis, 1, 71 Bis(pyrazol-l-yl)borane acetyl complexes, with iron, 6, 88 Bis(pyrazolyl)borates, in platinum(II) complexes, 8, 503 Bispyrazolyl-methane rhodium complex, preparation, 7, 185 Bis(pyrazolyl)methanes, in platinum(II) complexes, 8, 503 Bis(3-pyrazolyl)nickel complexes, preparation, 8, 80-81 Bis(2-pyridyl)amines... 

When a pyrazole ring is used as a scaffold to two pendant carbene donor groups, dime-tallic complexes can be formed [75] (see Figure 3.22). Similar complexes were also synthesised for nickel, rhodium and iridium [76,77]. Appreciable metal-metal interactions could not be observed in any of these complexes, with the exception of argentophilic [77,78] or aurophilic [79] interactions. As with other functionalised carbenes, these pyrazole bridged ones have precedences, in this case amine [80,81], phosphino [82] and Cp [83] functionalised pyrazole ligands. 

Since the Run(arene) unit is isoelectronic with the Min(C5Me5) (M = Rh or Ir) moieties, studies have been performed in order to obtain ruthenium analogous complexes containing (/j-OH) or (/a-OR) groups as well as pyrazolate ligands but perhaps with new stoichiometries, which were not observed in rhodium or iridium chemistry (126). 

Rhodium complexes with pyrazole or pyrazolate-type ligands have been studied as catalysts for hydrogenation of alkenes under ambient conditions in propan-2-ol <87JMOC34l). Hydroquinones... 

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