First X-ray crystal structure and NMR spectroscopic analysis of a lithiated 1,2-diazapentadiene

Abstract

Deprotonation of 1,2-diazapentadienes in Et₂O leads to the respective lithium compounds which, in the case of [(η¹-PhNLiNCHCMeCHPh)·Et₂O]₃, consists of an almost planar (Li–N)₃ hexagon resulting in a tunnel-like arrangement of the W-shaped 1,2-diazapentadienyl chains; the X-ray structure, solution NMR spectra and reactions with electrophiles are reported.

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