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Prezentacija predavanja [31,35 MiB]

Prezentacija predavanja [31,35 MiB]

Prezentacija predavanja [31,35 MiB]

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Reakcijom aluminija i metil- ili etil-halogenida<br />

dobivaju se seskvihalogenidi premoštenih struktura<br />

s halogenim atomima u mostovima.<br />

2Al + 3RX R 3Al 2X 3 (X = Cl, Br, I; R = Me, Et, Ph)<br />

-disproporcioniranje:<br />

2R 3Al 2X 3 R 2Al 2X 4 + R 4Al 2X 2<br />

-izravnom reakcijom alkil- ili aril-halogenida s<br />

legurom elektropozitivnih metala (npr. Na) i onih<br />

elektronegativnijih (npr. Hg, Tl, Pb, Bi) mogu se<br />

pripraviti alkilni i arilni derivate<br />

Hg(l) + 2MeBr(l) + 2Na(s) Me 2Hg(l) + 2NaBr(s)<br />

4EtCl(g) + 4NaPb(s) Et 4Pb(l) + 3Pb(s) + 4NaCl(s)

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