Mercury organo- compounds reaction with

Holliday and Taylor (59) have studied the reactions of tetrafluorodi-borane(4) with several organometallic reagents. No evidence was obtained for the formation of organo-substituted diboron compounds. Reaction with diphenylmercury led to reduction of a major fraction of the organometallic to metallic mercury, with formation of difluorophenylborane and BF3.Diethylmercury was reduced similarly, with formation of ethyldi-fluoroborane, BF3, and ethane. With tetravinyltin, the major products... 

A related cyclization step is employed in an approach to 4-quinolizidinones through intramolecular amidomercuriation of A-protected amines (194) followed by reaction of the organo-mercury compound (195) with acrylonitrile, deproteetion, and cyclization to (196) and (197) (Scheme 34) <84CC1235>. 

These compounds are the most stable of the three classes of organothal-lium(III) derivatives and have been prepared by a wide variety of classical organometallic procedures. Many exchange reactions of TIX3 (X = Cl, carboxylate) with organo derivatives of boron, mercury, tin, lead, etc., have been shown to result in formation of R2TIX compounds 73, 78), but are of relatively little preparative significance. The most frequently used procedure... 

The preparation of organopalladium compounds by exchange reactions of palladium salts and organo-lead, -tin, or -mercury compounds is apparently not the only way that they can be obtained but it does seem to be the most useful way. Convincing evidence is now available to show that direct metalation of aromatic compounds with palladium salts (palladation) can occur. Since the initial report of Cope and Siekman 32> that palladium chloride reacted readily with azobenzene to form an isolable chelated, sigma-bonded arylpalladium compound, several additional chelated arylpalladium compounds have been prepared. 

It is w ell known that many organo mercury compounds of the type RjjHg react with metallic and non-metallic chlorides to form organo-rnetabic derivatives of tlie metals in question. The present authors carried out a considerable number of reactions of this type, with various organometallic compounds, the results of which are showii in Table IV. of the Appendix. 

Relative stabilities of carbanions can be assessed from exchange reactions of organo-metallic compounds containing these anions . From NMR measurements of equilibria involving R2Mg and R Hg and from the polarographic reduction of mercury alkyls it has been deduced that the stability of the carbanion increases with the amount... 

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