Ring structures general considerations

Decomposition reactions following the (3-elimination mechanism are generally considerably faster than the decomposition reactions of the corresponding alkyl complexes. The decompositions of the L, M"+I CR R2CR3R4X transients that follow first order rate laws, are often acid catalyzed and produce usually the corresponding alkenes, Mre+1Lm, and X- as the final stable products. In some cases intermediates containing the alkenes bound to the metal-complex are observed (55,71,144). Thus the first product in all (3-elimination processes seems to be a -complex (or actually a structure between the extreme descriptions as -complex and that as a 3-ring metallocycle)... 

General Considerations. The first report on the direct formation of a metal-to-carbon bond leading to a chelate ring containing the metal, the carbon atom, and a hetero atom Y (in this case N) [18] generated considerable interest in complexes whose general structure can be described as follows ... 

General Considerations on the 1 nfluence of Structure of Both Starting Ring... 

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