Palladium complexes trinuclear clusters

NLO properties, 12, 771 from oxygenated ligands, 6, 842 with palladium, 8, 213 and Rh Cp complexes, 7, 160 trinuclear clusters, overview, 6, 835-871 Osmium complexes... 

Extended X-ray absorption fine stmcture (EXAFS) analysis has been employed recently for the investigation of the role of colloids in catalysis. For Heck reactions with Herrmarm s paUadacycle or with [Pd(OAc)2]/P(tert-Bu)3, no indication of formation of coUoidal palladium was found [44]. By contrast, Koningsberger and co-workers found that in aUyHc amination with allylpalladium complexes with bidentate phosphine Hgands, from the early stages of the reaction onward, deactivation occurs by formation of di- and trinuclear clusters, which aggregate to larger clusters and finally to palladium black [45]. 

Nickel forms organometallic clusters with three to six metal atoms. Among these some unusual structures and bonding situations occur which were mentioned in Chapter 2. The cluster chemistry of palladium is rather poor, and the outstanding features of platinum are a considerable number of trinuclear heterometallic complexes and the chimney-like structures of the clusters [Pt3(C0)g]. ... 

E5.4 Formation of platinum and palladium clusters with carbonyl and phosphine ligands E5.5 Reactivity and flexibility in platinum metal clusters E5.6 Excited state properties of the low-valent bi- and trinuclear complexes of palladium and platinum E5.7 Interstitial nickel carbonyl clusters... 

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