Acta Cryst. (2006). E62, m472-m474  [ doi:10.1107/S1600536806004041 ]

Lithiation of the diaminopyridine protio-ligand MeC(2-C₅H₄N){CH₂N(H)Mes}₂ (Mes = 2,4,6-C₆H₂Me₃)

B. D. Ward, L. H. Gade and P. Mountford

Abstract: Reaction of the diamidopyridine protio-ligand MeC(2-C₅H₄N){CH₂N(H)Mes}₂ (Mes = 2,4,6-C₆H₂Me₃) with butyllithium in diethyl ether affords the compound (diethyl ether)(₄-2-{6-[1,3-dimethyl-3-(2-pyridyl)-1,4-bis(2,4,6-trimethylanilinio)butyl]-2-pyridyl}-2-methyl-1,3-bis(2,4,6-trimethylanilinio)propane)tetralithium(I), [Li₄(C₅₅H₆₄N₆)(C₄H₁₀O)] or Li₄[MeC(2-C₅H₄N){CH₂N(Mes)}CHN(2,4,6-C₆H₂-Me₂C(Me)(2,2'-C₅H₃N){C(Me)}(CH₂NMes)₂](OEt₂), which shows the methylation of the pyridyl ortho-position with a methyl group of one of the mesityl groups. The complex contains four Li atoms, each of which is chemically distinct. The tetraanionic ligand contains two protio-ligand units which are fused together into a single entity. The structure contains two disordered molecules of diethyl ether, one of which is coordinated to one of the Li atoms.

Online 8 February 2006

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