1- Bromo-l-methylcyclopentane

III. It is named as 1-bromo-l-methylcyclopentane. Which of the above statements is/are wrong ... 

The alkyl radical should react with another starting-material molecule, in another prq>a-gation step, to generate a product and another radical. Reaction of the alkyl radical with Br2 gives 1-bromo-l-methylcyclopentane (the major product) and another bromine radical to continue the chain. 

In a study of the reaetion between alkyl halides and the electrogenerated naphthalene radical anion, Sease and Reed [297] observed that only alkyl chlorides, such as 1-chloro-hexane and 6-chloro-l-hexene, are catalytically reduced 1-chlorohexane gives only n-hex-ane, whereas 6-chloro-l-hexene affords methylcyclopentane and 1-hexene. In an earlier paper [296], the reactions of 1-bromo- and 1-chlorobutane with the electrogenerated radical anions of rmn -stilbene and anthracene in DMSO were examined. Britton and Fry [298] elucidated the kinetics of the electron-transfer reaction between 1-chlorooctane and the phenanthrene radieal anion in DMF. 

Draw structural representations of each of the following molecules (a) trans-l-chloro-2-ethylcyclopropane (b) cis-1-bromo-2-chlorocyclopentane (c) 2-chloro-l,l-diethylcyclopropane (d) frans-2-bromo-3-chloro-l,l-diethylcyclopropane (e) c/s-1,3-dichloro-2,2-dimethylcyclobutane (f) c(s-2-chloro-l,l-difluoro-3-methylcyclopentane. 

Intermolecular carbometallations are typically accomplished with organolithiums however, dia-stereocontrolled intramolecular carbometallation can be attained with appropriate Grignard reagents, as exemplified in Scheme 88, the suprafacial and 5-exo-trig closure of ( )-6-bromo-3-methyl-1 -trimethylsi-lyl-1-hexene (267) to fraru-l-methyl-2-(trimethylsilyl)methylcyclopentane (268).203... 

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