Lithium amides uncomplexed

Fig. 26. Structural types for uncomplexed lithium amides (RR NLi) .- (a) dimeric ring (n = 2), showing the projection of R,R groups above and below the ring plane (b) rings with n = 2,3, and 4 (c) further association of rings into ladders.

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. 

B. Uncomplexed Lithium Amides 1. Solid-State Structures... 

Structures and Key Parameters Found for Uncomplexed Lithium Amides... 

Isolated uncomplexed lithium amide dimers are not known in the solid state. However, electron diffraction shows (56) to be dimeric in the gas phase (80). The major change in structural parameters with ring... 

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