Abstract
This chapter covers the most useful organometallic compounds R-M with M = Li, Mg, or Cd, including Zn compounds and lithium cuprates. It illustrates the main features of R-Mg-Hal as reagents in synthetic work and reactions that produce Mg derivatives from which the products are liberated by a treatment with dilute acid. It also discusses the reactions with esters that result in ketones or aldehydes, which cannot be isolated under standard conditions. The chapter refers to the instability of intermediates, which is are not readily predicted by organic theory and stems from the decrease of free energy associated with their decompositions. It highlights the formation of the tertiary alcohol in high yield by R-Li, which provides a sharp contrast and exemplifies the modern trends towards the use of reagents.
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