Preparation and chemical reactivity

In the first part of the review, the structure and physico-chemical properties of enamines are discussed. Subsequent sections deal with the methods of preparation and chemical reactivity and are systematically classified according to the mechanism rather than according to their preparative value. 

Preparation and chemical reactivity of 2-chromanols 13ARK(1)101. Reactions of salicylaldehyde and enolates or their equivalents Versatile synthetic routes to chromane derivatives 12BJ02166. 

The aim of this research was the preparation of unique silicon-functional macroreagents, particularly linear polyolefins carrying one or two Si-Cl or Si-H termini and thus to combine the excellent physical properties offered by these polyhydrocarbons with the versatility and chemical reactivity of the Si-Cl and Si-H bonds. 

Brintzinger and co-workers, while investigating the formation and chemical reactivity of various titanocenes, prepared a novel triphenyl-phosphine-titanocene complex of empirical formula [C10H10TiP(C6H5)3]2 (22) whose structure to date has been undetermined. The purple complex 22 can be prepared by the four routes illustrated below 24). 

Fullerenes have potential applications in the preparation of carbon support catalyts and diamond films. They have high electrical conductivity and chemical reactivity. 

Alkene complexes can be prepared with platinum in a divalent or a zerovalent oxidation state. The electron density at the platinum center exerts significant changes in bonding between the alkene and platinum. These effects exhibit themselves in both structural features and chemical reactivities. 

Nalewajski RF, Korchowiec J (1996) Charge Sensitivity Approach to Molecular Structure and Chemical Reactivity. World Scientific, Singapore prepared for publication... 

A large number of cyclopentadienyl (Cp) complexes, both neutral and charged, has been prepared. Most of the complexes reported are for early to mid-transition metals. Rich redox and chemical reactivity has been reported (126). Extensive work on the Cp dithiolene complexes has been carried out by Sugimori et al. (127) and has recently been reviewed. A few representative examples are discussed below. 

Perfluoroalkylcopper reagents are the most studied perfluoroalkyl organometallic reagents due to their unique combination of thermal stability and chemical reactivity. They are readily prepared by copper metal insertion reactions with perfluoroalkyl halides in a coordinating solvent (e.g., formation of decarboxylation reactions of perfluoroalkanoic acid salts and copper(I) halide (e.g., formation of 2 ), or metathesis reactions (e.g., formation of 4 via 3 ). (Trifluoro-methyl)copper (4) has also been recently accessed by decomposition of methyl 2,2-difluoro-2-(fluorosulfonyl)acetate (5) or methyl perfluoro [2-(fluorosulfonyl)ethoxy]acetate (6) in the presence of copper(I) iodide and by reaction of trimethyl(trifluoromethyl)silane (7) with fluoride and copper(I) iodide. ... 

The electronic structure, morphology, and chemical reactivity of metal nanoclusters have attracted considerable attention due to their extensive technological importance. Chemical reactions and their catalytic relevance have been investigated on a variety of well-characterized, supported model catalysts prepared by vapor deposition of catalytically relevant metals onto ultrathin oxide films in ultrahigh vacuum conditions. Such ultrathin film supports are usually prepared by vaporizing a parent metal onto a refractory metal substrate in an oxygen atmosphere at a high temperature. These unique model systems are particularly well suited for surface-... 

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