Formation of organozincate species from diorganozinc compounds and salts

摘要

Stirring a benzene solution of a diorganozinc compound with aninsoluble alkali metal alkoxide (MeOK or MeONa) or potassium amide (PhN(Me)K) formed a solution containing a species having a salt: R_2Zn composition of 1:2 A salt (t-BuOK) that is soluble in benzene also forms a 1 : 2 species and, when that salt to R_2Zn ratio is sufficiently high, forms a 1 : 1 species. Controlled heating at reduced pressure of solutions prepared froman alkali metal alkoxide and an excess of a diorganozinc compound leaves materials with alkoxide : R_2Zn ratios of 1 : 2 or 1 : 1. Reactions of benzene solutions of diorganozinc compounds with (p-MeC_6H_4)SK or Ph_2PK form solutions of composition R_3ZnK.