Miscellaneous Reagents

The reaction of fluorine or xenon difluoride with iodoaUcanes gives fluoroalkanes by similar processes [53, 54]. 

Thioacetals and thioketals have significant synthetic potential for use in organic chemistry but are often neglected because of their unpleasant odor. A polymeric reagent for the preparation of ketones via 1,3-dithianes has been reported using 

5 hours. Furthermore, many reactions could be performed using only 0.01 equivalents of the polymer-bound reagent and excess sodium borohydride. 

The nature of hexachloroiridate(rv) in solution has been examined. In neutral or weakly acidic media, the reaction IrCle Ir may take place, but it occurs spontaneously in solutions of pH 11, with evolution of a gas and a colour change from reddish-brown (Ir ) to pale yellow-green (Ir )- The equilibrium  

Two studies are reported on the oxidation of iodide by octacyano-molybdate(v) ions. For the reaction  

The preparation, spectrum, and stability of indium(i) in aqueous solution have been described, concentrations of 3 x 10 mol 1 In being prepared by anodisation of an indium electrode. Conventional techniques have been used to investigate the reaction  

The rate-determining step may be either the association of the NOa+ into the inner sphere of the Re or (more likely) the electron-transfer process. The second reaction with NOa is considered to involve an associative equilibrium step with NO+. The monomeric product [ReClsNO] is an octahedral complex, and exchange studies show that one of the chloride ions is exchanged at a rate 10 times faster than the other four. The technetate ion (TCO4 -) has been shown to disproportionate rapidly in aqueous alkaline media. In the electrochemical reduction of Tc - Tc , if gelatine is present in the solution, the reaction  

The redox nature of palladium(ii) salts has been investigated, methods being described for the study of the rates of oxidation of olefins. The reduction of benzoquinone by 7r-allylpalladium chloride in aqueous hydrochloric acid solutions has also been reported.  

---

Part I deals with chapter involving typical complex organic reactions. Part II deals with various aspects of spectroscopy and the use of this technique in identification of compounds. Miscellaneous reagents used in organic synthesis are discussed in Part III. 

PART III—MISCELLANEOUS REAGENTS USED IN ORGANIC SYNTHESES... 

Propargyl alcohols may be converted to allenes by several methods, for example, (a) through the intermediate formation of propargyl halides which are not isolated but react directly with cuprous salts and hydrogen halide [60, 72-73] or cyanide [71] (b) typical alcohol reactions with thionyl chloride [74a-d] phosphorus halides [75-77], and miscellaneous reagents (see Scheme 3). 

N-Phenylselenophthalimide, 245 Additions involving selenium Benzeneselenenyl halides, 26 N-Phenylselenophthalimide, 245 Miscellaneous reagents Aluminum chloride, 15 Lithium bis(dimethylphenyl-silyl)cuprate, 161 Organotin reagents, 211 Addition reactions to carbonyl... 

---