CALCIUM, STRONTIUM, GERMANIUM, TIN, AND LEAD BIS(TRIMETHYLSILYL)AMIDO DERIVATIVES AND 2,2,6,6‐TETRAMETHYLPIPERIDIDO AND N‐ISOPROPYLPHENYLAMIDO DERVATIVES OF POTASSIUM AND CALCIUM

This chapter describes the synthesis of N(SiMe3)2 derivatives of some main group 2 and 14 elements, as well as 2,2,6,6‐tetramethylpiperidido and N(Ph)Pri salts of potassium and calcium. The originally described synthetic route to the heaviest group 2 element amides involved a displacement reaction between the group 2 metal (Mg–Ba) and Sn{N(SiMe3)2}2, which affords the calcium and strontium derivatives in good (>80%) yields. The chapter also describes salt elimination method of synthesis that affords pure products for the calcium and strontium derivatives. The synthesis of the divalent group 14 element bis{bis(trimethylsilyl)amido} germanium, tin, and lead complexes constitutes the remaining procedures in the chapter. Salt metathesis reactions between the metal diiodide and KN(SiMe3)2 in tetrahydrofuran (THF) solvent afforded the bis{bis(trimethylsilylamido)}bis(tetrahydrofuran) metal complexes M{N(SiMe3)2}2(THF)2.