Alkyl hahde Grignard reagents from

Organoantimony Compounds with Five Sb—C Bonds. A number of pentaalkyl- and pentaalkenylantimony compounds have been prepared from tetraalkyl- or tetraalkenylstibonium hahdes and alkyl or alkenyllithium or Grignard reagents, for example ... 

The synthesis involves the nickel-catalyzed coupling of the mono-Grignard reagent derived from 3-alkyl-2,5-diiodothiophene (82,83). Also in that year, transition-metal hahdes, ie, FeCl, MoCl, and RuCl, were used for the chemical oxidative polymerization of 3-substituted thiophenes (84). Substantial decreases in conductivity were noted when branched side chains were present in the polymer stmcture (85). 

Metal-halogen interconversions are primarily used to prepare organolithium compounds from alkyl and aryl hahdes. Particular Grignard reagents can be prepared from this methodology. They often give better yields than reactions between halides and magnesium... 

Grignard reagents react with ethylene oxide to yield primary alcohols containing two more carbon atoms than the alkyl hahde from which the organometallic componnd was prepared. 

From the Grignard reagent (prepared from the alkyl hahde and magnesium in dry ether) with the mercuric salt of the same halogen in ether... 

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