Simple Lithium Amides Amidolithiums and Their Complexes Ring Laddering

Simple Lithium Amides (Amidolithiums) and Their Complexes Ring Laddering 

We describe first the structures found for uncomplexed lithium amides (i.e., those not containing added neutral Lewis bases such as THF, HMPA, or TMEDA) by X-ray crystallography, by molecular orbital calculations, and by solution methods (Section III,B). In Section III,C, the structures of lithium amide complexes are discussed similarly. 

Uncomplexed Lithium Amides 1. Solid-State Structures 

60 A to H, 2.32 A). The f (ohexyl)2NLi] amide has been isolated as a colorless crystalline material (melting point 209-211°C), but twinning has so far prevented solution of the structure (157). An unsolvated (AsLi)3 ring trimer [ (Me3Si)2CH]2AsLi 3 has also been reported (158). However, in contrast to the (NLi)3 species (55)-(57), the ring is not planar and deviates from threefold symmetry. One of the 

Structures and Key Parameters Found for Uncomplexed Lithium Amides 

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