Reagent reactivity

Mixed ligand reagent Reactivity and properties Reference... 

The reactivity order of alkenes is that expected for attack by an electrophilic reagent. Reactivity increases with the number of alkyl substituents.163 Terminal alkenes are relatively inert. The reaction has a low AHl and relative reactivity is dominated by entropic factors.164 Steric effects govern the direction of approach of the oxygen, so the hydroperoxy group is usually introduced on the less hindered face of the double bond. A key mechanistic issue in singlet oxygen oxidations is whether it is a concerted process or involves an intermediate formulated as a pcrcpoxide. Most of the available evidence points to the perepoxide mechanism.165... 

Ligands containing a heteroatom at the organometallic site generally exhibit lower cuprate reagent reactivity and introduce difficulties in cuprate preparation. Devel-... 

II. DEFINITIONS OF REAGENTS-REACTIVE GROUPS OF OXIMES, HYDROXAMIC ACIDS AND RELATED SPECIES... 

Reagent Reactivity. One of the most interesting aspects of substitution reactions of square planar complexes is that the reaction rates depend on the nature of the reagent. This permits a thorough investigation of the factors responsible for reagent reactivity towards these substrates. Note that this has not been possible for the reactions of most six-coordinated metal complexes, since their rates do not depend on the reagent. 

II) systems, nor do we know the reagent reactivities toward these substrates. Such questions, and many others await investigation and possible answer. 

Sophiamma, P. N. Sreekumar, K. Polystyrene-Based Hydroxamic Esters Preparation and Application as Acyl Transfer Reagents, Reactive Functional Polymers 1997, 35, 169. 

Wilkinson s catalyst after its discoverer, G. Wilkinson. In 1973, the Nobel Prize in chemistry was awarded jointly to Wilkinson and E. O. H. Fischer for their respective contributions to the field of organometallic chemistry. As you will see in this and later chapters, compounds with carbon-metal bonds (organometallic compounds) are extremely useful reagents, reactive intermediates, or catalysts in organic reactions. To a very large extent, the work of Fischer and Wilkinson created the current interest and developments in the field of transition-metal organic chemistry, which will be discussed in Chapter 31. 

Benzotriazole, and Grignard reagent reactivity, 9, 46 Benzoylation, via bismuth(III) compounds, 9, 440... 

Chloro diamido complexes, with Ti(IV), 4, 418 419 Chlorodi- -butyltin hydride, in hydrostannations, 9, 351 Chlorodienes, and Grignard reagent reactivity, 9, 51 l-Chloro-2,2-difluorovinylzinc chloride, via lithium—zinc... 

Chloroenynes, and Grignard reagent reactivity, 9, 51 Chlorogermylenes, preparation, 3, 769—771 Chlorohydrins, via tin enolates, 9, 362 Chlorohydrogermanes, preparation, 3, 724—725 7-Chloro-4-(hydroxyamino)quinoline, with trinuclear Os clusters, 6, 743... 

Cyano compounds liquid crystals, 12, 278 in silver(III) complexes, 2, 241 Cyanocuprates, with copper, 2, 186 Cyano derivatives, a-arylation, 1, 361 Cyanosilanes, applications, 9, 322 Cyclic acetals, and Grignard reagent reactivity, 9, 53 Cyclic alkenes, asymmetric hydrosilylation, 10, 830 Cyclic alkynes, strained, with platinum, 8, 644 Cyclic allyl boronates, preparation, 9, 196 Cyclic allylic esters, alkylation, 11, 91 Cyclic amides, ring-opening polymerization, via lanthanide catalysis, 4, 145... 

Dialkyl-ligated tropocoronand complexes, with Hf(IV), 4, 811 Dialkylphosphine oxides, and Grignard reagent reactivity,... 

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