Organometallics fragmentation

As well as organic diiral auxiliaries, organometallic fragments have found some lonjugate addition reactions. PatLiciilarly note-aliyl complexes [69], diiral iron complexes [70], and planar diiral aretie diromium species [71]. 

The R2M Group 13 Organometallic Fragment Chelated by P-Centered Ligands... 

Mahalakshmi L, Stahlke D (2002) The R2M Group 13 Organometallic Fragment Chelated by P-centered Ligands. 103 85-116 Muller E, see Roewer G (2002) 101 59-136... 

Such organometallic dehydroannulenes A are expected to be formed as mixtures of diastereomers differing only with regard to the relative position of the organometallic fragments (above or below the plane of the large hydrocarbon ligand) with respect to each other. In respective diastereomers, only the spatial... 

Simultaneous measurements of both the amount of butane evolved and the quantity of grafted organometallic fragments at increasing time of reaction allows the stoichiometry of the surface complexes Pts[SnBux] / to be determined (Fig. 7). Furthermore, extrapolation to a low amount of Sn grafted shows that a [BusSnJ Pts species is formed, which then rapidly evolved towards more dealkylated species and finally to Pts[SnBu]jy. 

The surface species produced by this reaction are real surface organometallic fragments (15 in Fig. 7.13). 

In our laboratory we have utilized multiphoton infrared laser activation of metal ion-hydrocarbon adducts to probe the lowest energy pathways of complex reaction systems (6). Freiser and co-workers have utilized dispersed visible and uv radiation from conventional light sources to examine photochemical processes involving organometallic fragments... 

Endothermic Reactions and the Determination of Bond Dissociation Energies for Organometallic Fragments. The reaction of atomic nickel ion with molecular hydrogen to yield NiH+is substantially endothermic. Reaction cross sections for this process, measured using the ion beam apparatus shown in Figure 1, are displayed in Figure 3 for reactions 1 and 2 with HD as the neutral. 

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