Organokaliumchemie


The organokali chemistry studies compounds in which a direct bond occurs between carbon and potassium. It is therefore part of the organometallic chemistry. The applications of this group of compounds are very limited in number, especially due to the easy accessibility of the corresponding organolithium compounds.

Unlike organolithium compounds, the bond between potassium and carbon is pure ionic: carbon is present as a carbanion and reacts as a strong nucleophile. Sample connections

A well-known application is Schlosser's base, a mixture of n-butyl lithium and potassium tert-butoxide. This reagent reacts with propylene to allyl potassium (KCH2CH = CH2). cis-2-butene and trans-2-butene form a balance in the presence of alkali metals, including potassium.

The metallization of triphenylmethane with metallic potassium in toluene and PMDTA resulted in the formation of an adduct between triphenylmethylkalium and PMDTA: [Ph3CK · PMDTA] n. These are red crystals with a polymeric structure. Higher alkali metals: rubidium and cesium

The higher alkali metals are even more reactive in their organic compounds than organocal compounds. There are few applications of organorubidium or organocesium compounds described. Unlike the high isomerization rate achieved with lithium and sodium, the reaction rate with the higher alkali metals, including potassium, is slow. Navigation

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