Alkali and alkaline-earth metal complexes with inverse crown structures

8 Alkali and alkaline-earth metal complexes with inverse crown structures 

Group 1 metal Group 2 metal Amide ion Core moiety Host ring size 

A remarkable series of inverse crown compounds featuring organic guest moieties encapsulated within host-like macrocyclic rings composed of sodium/potassium and magnesium ions together with anionic amide groups, such as TMP- (TMPH = 2,2,6,6-tetramethylpiperidine) and Pr NT (Pr NII = diisopropylamine), have been synthesized and characterized. Table 12.8.1 lists some examples of this class of inverse crown molecules. 

Molecular structures of two centrosymmetric inverse crown molecules containing organic cores  

Cotton, G. Wilkinson, C. A. Murillo and M. Bochmann, Advanced Inorganic Chemistry, 6th edn., Wiley-Interscience, New York, 1999. 

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