Structure and Chemical Behavior of an η ~5-(1-Azapentadienyl)lithium Derivative Generated by Deprotonation Reactions Starting from 9-(N-tert-Butylaminomethyl)fluorene or 6-(tert-Butylamino)dibenzofulvene

摘要

The compound shows a polymeric "super-sandwidh" structure with an alternating fluorenyl-Li.Oet_2 arrangement exhibiting inversion symmetry. The X-ray crystal structure analysis of 10.(THF)_3 reveals an unsymmetrical arrangement of the lithium atoms at the amidomethylfluorenyl- "dianion" framework with on THF molecule bridging between the metal centers. The bonding features of the dilithiated system 10 derived by double deprotonation of 6 were also analyzed by computational chemistry.