Perfluoroaryl group

Hydrolysis of geminal fluorides requires activation by per- or polyfluoroalkyl or perfluoroaryl groups and by double bonds linked to the same or adjacent carbon The activation is the result of reducing the electron density at the fluorinated carbon, facilitating attack by, primarily, nucleophilic reagents... 

The stmctiual properties of materials containing both aryl and perfluoroaryl groups have attracted attention in recent years because of the observed propensity for such... 

In polyfluorobenzenes having other substituents in addition to fluorine, including per-fluoroalkyl or perfluoroaryl groups, the elimination of only one fluorine atom proceeds more readily, with the para position in pentafluorobenzene derivatives being replaced first. The reaction conditions used for monosubstitution of fluorine depend markedly on the substrate and on the nucleophilic agent chosen. In most cases the reaction can be carried out in ethylene glycol/pyridine using sodium hydroxide as base (Table 3). 

It should also be pointed out that the symbols Rp or Arp are also often used and they usually refer to monovalent perfluoroalkyl or perfluoroaryl group. Despite the fact that Rp or Arp are recommended abbreviation of the corresponding groups, nowadays in scientific hteramre, symbols Rf or Arf are also used as equivalent of perfluoroalkyl or perfluoroaryl groups, respectively. In this book, both types of abbreviations can be found, although we were trying to adhere to original Rp or Arp abbreviations. 

IndlumdII) porphyrins having an axially-bonded perfluoroaryl group, synthesised from the appropriate Grlgnard raegent and the chlorolndlum porphyrin, are quite stable thus enabling the electrochemical behaviour to be readily studied. 

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