Cluster compounds rearrangements

Skeletal rearrangements in cluster compounds containing the Group IB metals... 

It must be pointed out that the exact nature of the catalytic species has not been established in the case of the metal cluster compounds listed in Table I. Rearrangement of the added cluster compounds to some other cluster species under the reaction conditions is readily conceivable, and in several cases, very probable. 

Since 1970 or before, chemists have relied on classical, detailed temperature-dependent line-shape analyses.Indeed, fundamental contributions to our understanding of the dynamics of fluxional metal complexes with vr-hydrocarbon ligands,tertiary phosphorus donors, as well as TT-allyl anions,all stem from these types of measurement. Their contributions to metal carbonyl dynamics and rearrangements in cluster compounds is even more pronounced, and we cite selected studies in this very large area of organometallic chemistry.For slow exchange... 

In Volume II, which will be published in the near future, the following topics will be covered The Potential Utility of Transition Metal-Alkyne Complexes and Derived Cluster Compounds as Reagents in Organic Synthesis (K. M. Nicholas, M. O. Nestle, and D. Seyferth) Arene Complexes in Organic Synthesis (G. Jaouen) and Oxidation, Reduction, Rearrangement, and Other Synthetically Useful Processes (H. Alper). 

Insertion and rearrangement steps were also observed in the reaction of 1 with B2C1443 (Scheme 14). Compounds 52 and 53 were characterized by NMR spectroscopic or mass-spectrometric data, compound 54 by an X-ray crystal structure analysis. 54 may be regarded as a borane-stabilized boranediyl, consisting of a Me5C5B nido-cluster unit (Fig. 8). 

Charge density-NMR chemical shift correlation in organic ions, 11, 125 Charge distribution and charge separation in radical rearrangement reactions, 38, 111 Chemically induced dynamic nuclear spin polarization and its applications, 10, 53 Chemiluminesance of organic compounds, 18, 187 Chiral clusters in the gas phase, 39, 147... 

So far, all efforts to generate, isolate and characterize heterofuUerenes via Kratsch-mer-Huffman vaporization of graphite in the presence of hetero-element-containing compounds such as boron nitride (BN) or cyanogen (CN)2 have failed. An alternative route for the direct formation of heterofuUerenes is cluster rearrangement within exohedral fullerene derivatives such as iminofullerenes and azafuUeroids. The first hints of success by this approach were obtained from mass spectrometry investigations of the cis-l-diazabishomo[60]fullerene 3 [12], the n-butylamine adduct 4 [12] the 1,2-epiminofullerene 5 [11] and the cluster opened ketolactam 6 [2]. 

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